Nutritional advice

Objectives:
The associations between intake of anthocyanins and anthocyanin-rich berries and cardiovascular risks remained to be established. Therefore, this review article has been conducted.

Do purified anthocyanin supplements and dietary intakes of anthocyanin-rich berries reduce cardiovascular risk?

Study design:
This review article included 44 eligible RCTs consisting of 52 comparison groups and 2,353 subjects and 15 prospective cohort studies with 5,54,638 subjects (persons).

7 of the 44 RCTs were crossover trials with the rest parallel-designed.
15 of the included studies investigated the effects of purified anthocyanins, all of which were produced from berries. For the remaining anthocyanin-rich berry studies, interventions were blueberry in 13 studies, cranberry in 12 studies, bilberry in 3 studies and blackcurrant in 1 study.
The intervention durations ranged from 2 weeks to 24 months with a median of 8 weeks.
24 of the 44 RCTs were rated as high quality with the others as low to moderate quality.

The follow-up periods of 15 cohort studies ranged from 4.3 to 24 years with a median of 12 years. Most of the included cohort studies used FFQ to assess dietary anthocyanin intake and only 3 of them used dietary records.
12 of the 15 cohort studies were rated as high quality.

There was no publication bias, except for the effects of purified anthocyanins on HDL cholestrerol levels [Begg's p = 0.016].

Results and conclusions:
The investigators found pooled analysis of RCTs showed that purified anthocyanin supplements significantly reduced blood LDL cholesterol (bad cholesterol) concentrations [WMD = -5.43 mg/dL, 95% CI = -8.96 to -1.90 mg/dL, p = 0.003]. 

The investigators found pooled analysis of RCTs showed that purified anthocyanin supplements significantly reduced triglyceride concentrations [WMD = -6.18 mg/dL, 95% CI = -11.67 to -0.69 mg/dL, p = 0.027, I2 = 0%]. 

The investigators found pooled analysis of RCTs showed that purified anthocyanin supplements significantly increased HDL cholesterol (good cholesterol) concentrations [WMD = 2.76 mg/dL, 95% CI = 1.34 to 4.18 mg/dL, p 0.001, I2 = 43.5%].
Subgroup analysis showed that the effects on HDL cholesterol concentrations were not significantly influenced by study duration, health status of subjects, anthocyanin doses, study quality and funding source.

The investigators found pooled analysis of RCTs showed that purified anthocyanin supplements significantly reduced tumor necrosis factor alpha concentrations [WMD = -1.62 pg/mL, 95% CI = -2.76 to -0.48 pg/mL, p = 0.005, I2 = 0%].

The investigators found pooled analysis of RCTs showed that purified anthocyanin supplements significantly reduced C-reactive protein concentrations [WMD = -0.028 mg/dL, 95% CI = -0.050 to -0.005 mg/dL, p = 0.014, I2 = 26%].

The investigators found pooled analysis of RCTs showed administration of anthocyanin-rich berries (blueberry, cranberry, bilberry and blackcurrant) significantly reduced blood total cholesterol concentrations [WMD = -4.48 mg/dL, 95% CI = -8.94 to -0.02 mg/dL, p = 0.049]. 

The investigators found pooled analysis of RCTs showed administration of anthocyanin-rich berries (blueberry, cranberry, bilberry and blackcurrant) significantly reduced C-reactive protein concentrations [WMD = -0.046 mg/dL, 95% CI = -0.070 to -0.022 mg/dL, p 0.001, I2 = 0%].

The investigators found pooled analysis of cohort studies showed high dietary anthocyanins intakes significantly reduced risk of coronary heart disease (CHD) with 17% [relative risk = 0.83, 95% CI = 0.72 to 0.95, p = 0.009, I2 = 51.2%].

The investigators found pooled analysis of cohort studies showed high dietary anthocyanins intakes significantly reduced risk of total cardiovascular disease incidence with 27% [relative risk = 0.73, 95% CI = 0.55 to 0.97, p = 0.03, I2 = 76.7%].

The investigators found pooled analysis of cohort studies showed high dietary anthocyanins intakes significantly reduced risk of cardiovascular disease deaths with 9% [relative risk = 0.91, 95% CI = 0.87 to 0.96, p 0.001, I2 = 0%].

Subgroup analysis revealed that the protective roles of dietary anthocyanins against cardiovascular disease deaths was only found in women [RR = 0.89, 95% CI = 0.82 to 0.96, p = 0.003, I2 = 0.0%] and not in men [RR = 0.92, 95% CI = 0.79 tot 1.07, p = 0.263, I2 = 0.0%].

The investigators concluded current clinical and epidemiological evidence show the protective roles of purified anthocyanin supplements during 8 weeks and anthocyanin-rich berries (blueberry, cranberry, bilberry and blackcurrant) on cardiovascular health. These results suggest that regular consumption of either purified anthocyanins or anthocyanin-rich berries could prevent cardiovascular disease through their lipid-lowering and anti-inflammatory properties. Therefore, anthocyanins and anthocyanin-rich berries should be taken into consideration when formulating cardioprotective diets in the future.

Original title:
Anthocyanins, Anthocyanin-Rich Berries, and Cardiovascular Risks: Systematic Review and Meta-Analysis of 44 Randomized Controlled Trials and 15 Prospective Cohort Studies by Xu L, Tian Z, […], Yang Y.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8714924/

Additional information of El Mondo:
Find more information/studies on anthocyanins, lowering cholesterol levels and cardiovascular disease right here.

Objectives:
Previous studies have not fully described the relationship between high-density lipoprotein cholesterol (HDL-C) and death risks from all cause and cardiovascular disease (CVD). Therefore, this review article has been conducted.

Does a high HDL cholesterol level (good cholesterol) reduce all cause and cardiovascular disease mortality risk?

Study design:
This review article included 32 prospective cohort studies with a total of 369,904 participants and 33,473 total deaths (9,426 cardiovascular disease deaths or cardiovascular disease mortality).

Results and conclusions:
The investigators found compared to the lowest HDL cholesterol level, the highest HDL cholesterol level significantly reduced all cause mortality risk by 18% [RR = 0.82, 95% CI = 0.73 to 0.93].
The lowest all cause mortality risk was observed at approximately 1.34 mmol/L.

The investigators found compared to the lowest HDL cholesterol level, the highest HDL cholesterol level significantly reduced cardiovascular disease mortality risk by 36% [RR = 0.64, 95% CI = 0.46 to 0.89].
The lowest cardiovascular disease mortality risk was observed at approximately 1.55 mmol/L.

The investigators found every increment of HDL cholesterol level with 1 mmol/L significantly reduced all cause mortality risk by 15% [RR = 0.85, 95% CI = 0.79 to 0.92].
Significant means that there is an association with a 95% confidence.

The investigators found every increment of HDL cholesterol level with 1 mmol/L significantly reduced cardiovascular disease mortality risk by 23% [RR = 0.77, 95% CI = 0.69 to 0.87].

The investigators found evidence of nonlinear and negative dose-response associations of HDL cholesterol level with all cause and cardiovascular disease mortality risk [p nonlinearity 0.001].

The investigators concluded HDL cholesterol level (good cholesterol) reduces all cause and cardiovascular disease mortality risk under approximately 2.05 and 2.33 mmol/L, respectively. Optimal doses require investigation via clinical practice or high-quality research.

Original title:
A dose-response meta-analysis to evaluate the relationship between high-density lipoprotein cholesterol and all-cause and cardiovascular disease mortality by Liu L, Han M, […], Hong F.

Link:
https://pubmed.ncbi.nlm.nih.gov/34676492/

Additional information of El Mondo:
Find more information/studies on cholesterol and cardiovascular disease right here.

Objectives:
Do diets rich in protein causually reduce body weight of adults with overweight or obesity? 

Study design:
This review article included 37 RCTs.
The diets were included during a mean of 32 weeks interventions, ranging from 8 to 104 weeks.

There was no publication bias.

Results and conclusions:
The investigators found protein intake (ranging from 18-59 energy percentage [En%]) significantly reduced body weight by 1.6 kg [95% CI = 1.2 to 2.0 kg, I2 = 56%] compared to controls (digestible carbohydrate, fiber, fat or no supplementation (no placebo used)).
This result was also found in sensitivity analysis.

The investigators found the effect size of dietary protein in body weight management was dependent on specific phenotypes, where individuals with prediabetes had more benefit compared to individuals with normoglycemia.
Furthermore, individuals without the obesity risk allele (AA genotype) had more benefit compared to individuals with the obesity risk alleles (AG and GG genotypes).

The investigators concluded that diets rich in protein (18-59 energy percentage [En%]) during 32 weeks causally have a moderate beneficial effect on body weight management of adults with overweight or obesity.

Original title:
Are Dietary Proteins the Key to Successful Body Weight Management? A Systematic Review and Meta-Analysis of Studies Assessing Body Weight Outcomes after Interventions with Increased Dietary Protein by Hansen TT, Astrup A and Sjödin A.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8468854/

Additional information of El Mondo:
Find more information/studies on protein consumption and overweight right here.

A diet rich in protein with 18-59 energy percentage [E%] or a diet with 18-59 En% protein means that the amounts of protein contribute 18 to 59% to the total calories (kcal) of the diet.
If the diet contains 2000 kcal, 90 grams of protein contribute 18% to this 2000 kcal.
1 gram of protein gives 4 kcal. Thus 90 grams of protein provide 360 kcal (90x4 kcal) and 360 kcal is 18% of 2000 kcal.

The most easy way to follow a diet rich in protein with 18-59 energy percentage is to choose only meals/products with 18-59 En% protein. Check here which products contain 18-59 En% protein.

However, the most practical way to follow a diet with 18-59 En% protein is, all meals/products that you eat on a daily basis should contain on average 18-59 En% protein.

To do this, use the 7-points nutritional profile app to see whether your daily diet contains 18-59 En% protein.

A high-protein diet is a diet with at least 20 En% protein.

 

Objectives:
The association between vitamin C and metabolic syndrome (MetS) has been evaluated in several epidemiological studies with conflicting results. Therefore, this review article has been conducted.

Do dietary vitamin C intake and circulating vitamin C level reduce risk of metabolic syndrome? 

Study design:
This review article included 26 cross-sectional studies and 2 cohort studies with a total number of 110,771 participants. 23 studies were related to the dietary vitamin C level.
The sample size ranged from 143 to 27,656 persons.
The dietary vitamin C level was assessed by food-frequency questionnaire (FFQ) in 4 studies, a 24-h or 3-day recall in 18 studies and a 4-day record in 1 study.

No evidence of publication bias existed according to Begg's rank correlation test [p = 0.495].

Results and conclusions:
The investigators found when compared to the lowest dietary vitamin C intake, that the highest dietary vitamin C intake significantly reduced risk of metabolic syndrome with 7% [overall multivariable-adjusted RR = 0.93, 95% CI = 0.88 to 0.97, p = 0.003, I2 = 54.5%, p = 0.003]. The above findings were confirmed in cross-sectional studies [RR = 0.92, 95% CI = 0.87 to 0.97, p = 0.001] and 24-h or 3-day recall [RR = 0.89, 95% CI = 0.86 to 0.93, p 0.001] studies.

The investigators found when compared to the lowest circulating vitamin C level, that the highest circulating vitamin C level significantly reduced risk of metabolic syndrome with 40% [overall multivariable-adjusted RR = 0.60, 95% CI = 0.49 to 0.74, p 0.001, I2 = 22.7%, p = 0.249].

The investigators concluded that both the dietary and the circulating vitamin C level reduce risk of metabolic syndrome. However, due to the limitation of the available evidence, more well-designed prospective studies are still needed.

Original title:
Vitamin C and Metabolic Syndrome: A Meta-Analysis of Observational Studies by Guo H, Ding J, [...], Zhang Y.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8531097/

Additional information of El Mondo:
Find more information/studies on vitamin C consumption and overweight right here.

In practice, a lot of dietary vitamin C intake amounts to 200 to 300 grams of vegetables and 2-5 pieces of fruit per day. Vitamin C is found in fruit and vegetables.

A high circulating vitamin C level can be obtained through vitamin C-rich food and/or taking vitamin C supplements.

 

Objectives:
The associations between dietary carbohydrate and diverse health outcomes remain controversial and confusing. Therefore, this review article (meta-analyse) has been conducted.

What is the association between dietary carbohydrate intake and diverse health outcomes?

Study design:
This review article included 43 meta-analyses of observational research studies with 23 health outcomes, including cancer (n = 26), mortality (n = 4), metabolic diseases (n = 4), digestive system outcomes (n = 3) and other outcomes [coronary heart disease (n = 2), stroke (n = 1), Parkinson's disease (n = 1) and bone fracture (n = 2)].

This umbrella review summarized 281 individual studies with 13,164,365 participants.

33.3% studies were considered to be of high quality and 66.7% of moderate quality.

Results and conclusions:
The investigators found highly suggestive evidence showed that dietary carbohydrate intake significantly increased risk of metabolic syndrome with 25% [adjusted summary odds ratio = 1.25, 95% CI = 1.15 to 1.37].

The investigators found suggestive evidence showed that dietary carbohydrate intake significantly decreased risk of esophageal adenocarcinoma with 43% [adjusted summary hazard ratio = 0.57, 95% CI = 0.42 to 0.78].

The investigators found suggestive evidence showed that dietary carbohydrate intake significantly increased risk of all-cause mortality with 19% [adjusted summary hazard ratio 1.19, 95% CI = 1.09 to 1.30].

The investigators concluded despite the fact that numerous systematic reviews and meta-analyses have explored the relationship between carbohydrate intake and diverse health outcomes, there is no convincing evidence of a clear role of carbohydrate intake. However, highly suggestive evidence shows carbohydrate intake is associated with higher risk of metabolic syndrome. Suggestive evidence shows carbohydrate intake is associated with higher risk of all-cause mortality and lower risk of esophageal adenocarcinoma.

Original title:
Dietary Carbohydrate and Diverse Health Outcomes: Umbrella Review of 30 Systematic Reviews and Meta-Analyses of 281 Observational Studies by Liu YS, Wu QJ […], Zhao YH.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8116488/

Additional information of El Mondo:
Find more information/studies on carbohydrate consumption and obesity/overweight right here.

Objectives:
The relation between sodium intake and cardiovascular disease remains controversial, owing in part to inaccurate assessment of sodium intake. Assessing 24-hour urinary excretion over a period of multiple days is considered to be an accurate method. Therefore, this review article has been conducted.

Do higher sodium and lower potassium dietary intakes, as measured in multiple 24-hour urine samples, reduce in a dose-response manner cardiovascular risk?

Study design:
This review article included 6 prospective cohort studies with a total of 10,709 healthy adults (54.2% women), of whom, 571 cardiovascular events were ascertained during a median study follow-up of 8.8 years (incidence rate: 5.9 per 1000 person-years).

The mean (±SD) age was 51.5±12.6 years.

Results and conclusions:
The investigators found that the median 24-hour urinary sodium excretion was 3,270 mg (10th to 90th percentile, 2099 to 4899).

The investigators found higher sodium excretion, lower potassium excretion and a higher sodium-to-potassium ratio were all significantly associated with a higher cardiovascular risk in analyses that were controlled for confounding factors [p ≤ 0.005 for all comparisons].

The investigators found in analyses that compared quartile 4 of the urinary biomarker (highest) with quartile 1 (lowest), the hazard ratios were 1.60 [95% CI = 1.19 to 2.14] for sodium excretion, 0.69 [95% CI = 0.51 to 0.91] for potassium excretion and 1.62 [95% CI = 1.25 to 2.10] for the sodium-to-potassium ratio.

The investigators found each daily increment of 1,000 mg in 24-hour urinary sodium excretion was significantly associated with an 18% increase in cardiovascular risk [hazard ratio = 1.18, 95% CI = 1.08 to 1.29].

The investigators found each daily increment of 1,000 mg in 24-hour urinary potassium excretion was significantly associated with an 18% decrease in cardiovascular risk [hazard ratio = 0.82, 95% CI = 0.72 to 0.94].

The investigators concluded higher sodium and lower potassium dietary intakes, as measured in multiple 24-hour urine samples, reduce in a dose-response manner cardiovascular risk. These findings may support reducing sodium intake and increasing potassium intake from current levels.

Original title:
24-Hour Urinary Sodium and Potassium Excretion and Cardiovascular Risk by Ma Y, He FJ, […], Hu FB.

Link:
https://pubmed.ncbi.nlm.nih.gov/34767706/

Additional information of El Mondo:
Find more information/studies on sodium and potassium consumption and cardiovascular disease right here.

A 24-hour urine sample is simply a collection of all urine passed over a 24-hour period of time. The test is used to check kidney function.
The normal range for 24-hour urine volume is 800 to 2,000 milliliters per day (with a normal fluid intake of about 2 liters per day).

Objectives:
Potential effects of inositol supplementation on blood pressure (BP) have been examined in several interventional studies. Nevertheless, findings in this context are controversial. Therefore, this review article has been conducted.

Do inositol supplements reduce blood pressure in humans?

Study design:
This review article included 7 eligible RCTs.

Results and conclusions:
The investigators found significant decline in both systolic blood pressure (SBP) [WMD = -5.69 mmHg, 95% CI = -7.35 to -4.02, p 0.001] and diastolic blood pressure (DBP) [WMD = -7.12 mmHg, 95% CI = -10.18 to -4.05, p 0.001] following supplementation with inositol.

The investigators found subgroup analysis showed that studies performed in individuals with metabolic syndrome with a longer duration (>8 weeks) and a dose of 4000 mg inositol supplements resulted in a more effective reduction in systolic blood pressure and diastolic blood pressure with acceptable homogeneity.

The investigators concluded that 4000 mg inositol supplements during at least 8 weeks reduce blood pressure, particularly in individuals with metabolic syndrome. Further large-scale RCTs with better design are needed to confirm these findings.

Original title:
The effect of inositol supplementation on blood pressure: A systematic review and meta-analysis of randomized-controlled trials by Tari SH, Sohouli MH, […], Rahideh ST.

Link:
https://pubmed.ncbi.nlm.nih.gov/34330516/

Additional information of El Mondo:
Find more information/studies on inositol and cardiovascular disease right here.

Objectives:
What is the association between red meat and poultry consumption and the risk of metabolic syndrome?

Study design:
This review article included 9 prospective cohort studies, which involved a total of 21,869 participants.
Among them, 8 studies were identified for red meat consumption.

No publication bias was observed according to the Begg's rank-correlation test and the Egger's test.  

Results and conclusions:
The investigators found that red meat consumption was significantly associated with a higher risk of 35% for metabolic syndrome [multi-variable adjusted RR = 1.35, 95% CI = 1.13 to 1.62, p = 0.001, I2 = 54.4%, p = 0.032].  
The same results were obtained in subgroup analysis for >5 years follow-up [RR = 1.36, 95% CI = 1.09 to 1.7, p = 0.006], non-National Cholesterol Education Program-Adult Treatment Panel (NCEP-ATP III) [RR = 1.34, 95% CI = 1.12 to 1.62, p = 0.002], Non-Asia [RR = 1.51, 95% CI = 1.29 to 1.77, p 0.001], adjustment of BMI [RR = 1.4, 95% CI = 1.23 to 1.6, p 0.001] and physical activity studies [RR = 1.48, 95% CI = 1.29 to 1.71, p 0.001].

The investigators found that unprocessed red meat consumption was significantly associated with a higher risk of 32% for metabolic syndrome [multi-variable adjusted RR = 1.32, 95% CI = 1.14 to 1.54, p = 0.0003, I2 = 0%, p = 0.397].  

The investigators found that processed red meat consumption was significantly associated with a higher risk of 48% for metabolic syndrome [multi-variable adjusted RR = 1.48, 95% CI = 1.11 to 1.97, p = 0.007, I2 = 64.7%, p = 0.097].  

The investigators found that poultry consumption was significantly associated with a lower risk of 15% for metabolic syndrome [multi-variable adjusted RR = 0.85, 95% CI = 0.75 to 0.97, p = 0.02, I2 = 0%, p = 0.707].  

The investigators concluded that red meat (processed and unprocessed) consumption is associated with a higher risk of metabolic syndrome, whereas, poultry consumption is associated with a lower risk of metabolic syndrome. More well-designed randomized controlled trials are still needed to address the issues further.

Original title:
Association of Red Meat and Poultry Consumption With the Risk of Metabolic Syndrome: A Meta-Analysis of Prospective Cohort Studies by Guo H, Ding J, [...], Zhang Y.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8295459/

Additional information of El Mondo:
Find more information/studies on meat consumption and obesity/overweight right here.

Objectives:
Epidemiological studies have shown that higher intake of flavonoid is inversely associated with coronary heart disease (CHD) risk. However, which flavonoid subclass (including anthocyanins, flavonols) could reduce CHD risk has remained controversial. Therefore, this review article has been conducted.

Do dietary intakes of anthocyanins, proanthocyanidins, flavonols, flavones and isoflavones reduce coronary heart disease?

Study design:
This review article included 19 independent prospective cohort studies with 894,471 participants and 34,707 persons with coronary heart disease.
 
Results and conclusions:
The investigators found that dietary intakes of anthocyanins significantly reduced risk of coronary heart disease with 10% [RR = 0.90, 95% CI = 0.83 to 0.98].

The investigators found that dietary intakes of proanthocyanidins significantly reduced risk of coronary heart disease with 22% [RR = 0.78, 95% CI = 0.65 to 0.94].

The investigators found that dietary intakes of flavonols significantly reduced risk of coronary heart disease with 12% [RR = 0.88, 95% CI = 0.79 to 0.98].

The investigators found that dietary intakes of flavones significantly reduced risk of coronary heart disease with 6% [RR = 0.94, 95% CI = 0.89 to 0.99].

The investigators found that dietary intakes of isoflavones significantly reduced risk of coronary heart disease with 10% [RR = 0.90, 95% CI = 0.83 to 0.98].

The investigators found in dose-response analysis that increment of 50 mg/d dietary anthocyanins significantly reduced risk of coronary heart disease with 5%.

The investigators found in dose-response analysis that increment of 100 mg/d dietary proanthocyanidins significantly reduced risk of coronary heart disease with 5%.

The investigators found in dose-response analysis that increment of 25 mg/d dietary flavonols significantly reduced risk of coronary heart disease with 5%.

The investigators found in dose-response analysis that increment of 5 mg/d dietary flavones significantly reduced risk of coronary heart disease with 5%.

The investigators found in dose-response analysis that increment of 0.5 mg/d dietary isoflavones significantly reduced risk of coronary heart disease with 5%.

The investigators found sensitivity and subgroup analyses supported these associations.

The investigators concluded that daily dietary intakes of 50mg anthocyanins, 100 mg proanthocyanidins, 25mg flavonols, 5mg flavones or 0.5mg isoflavones reduce coronary heart disease.

Original title:
Flavonoid subclasses and coronary heart disease risk: a meta-analysis of prospective cohort studies by Fan ZK, Wang C, [...], Li D.

Link:
https://pubmed.ncbi.nlm.nih.gov/34470681/

Additional information of El Mondo:
Find more information/studies on flavonoid and cardiovascular disease right here.

Objectives:
Nuts are recommended for cardiovascular health, yet concerns remain that nuts may contribute to weight gain due to their high energy density. Therefore, this review article has been conducted.

Does nut consumption contribute to an increased adiposity risk?

Study design:
This review article included 6 prospective cohort studies with 569,910 participants and 86 RCTs with 114 comparisons and 5,873 participants.

Results and conclusions:
The investigators found nuts consumption was significantly associated with a lower risk of 7% for incidence of overweight/obesity [RR = 0.93, 95% CI = 0.88 to 0.98, p 0.001, moderate certainty of evidence] in prospective cohort studies.

The investigators found RCTs showed no adverse effect of nuts on body weight [MD = 0.09 kg, 95% CI = -0.09 to 0.27 kg, p 0.001, high certainty of evidence].

The investigators found meta-regression showed that higher nut intake was significantly associated with reductions in body weight and body fat.

The investigators concluded that current evidence demonstrates the concern that nut consumption contributes to increased adiposity appears unwarranted.

Original title:
Are fatty nuts a weighty concern? A systematic review and meta-analysis and dose-response meta-regression of prospective cohorts and randomized controlled trials by Nishi SK, Viguiliouk E, [...], Sievenpiper JL.

Link:
https://pubmed.ncbi.nlm.nih.gov/34494363/

Additional information of El Mondo:
Find more information/studies on nut consumption and obesity/overweight right here.

Objectives:
LDL particle size and number (LDL-P) are emerging lipid risk factors. Nonsystematic reviews have suggested that diets lower in carbohydrates and higher in fats may result in increased LDL particle size when compared with higher-carbohydrate diets. Therefore, this review article has been conducted.

Do dietary interventions restricted in carbohydrates increase LDL peak particle size and decrease the numbers of total and small LDL particles?

Study design:
This review article included 38 randomized trials (of any length that reported on dietary carbohydrate restriction (intervention) compared with higher carbohydrate intake (control)) with a total of 1,785 participants.

Results and conclusions:
The investigators found dietary carbohydrate restriction were significantly associated with an increase in LDL peak particle size [SMD = 0.50, 95% CI = 0.15 to 0.86, p 0.01] and a reduction in LDL particle number [SMD = -0.24, 95% CI = -0.43 to -0.06, p = 0.02], when compared with higher carbohydrate intake.  

The investigators found the effect of carbohydrate-restricted dietary interventions on LDL peak particle size appeared to be partially explained by differences in weight loss between intervention groups and exploratory analysis revealed a shift from small dense to larger LDL subclasses.

The investigators found no statistically significant association between carbohydrate-restricted dietary interventions and mean LDL particle size [SMD = 0.20, 95% CI = -0.29 to 0.69, p = 0.37], when compared with higher carbohydrate intake.  

The investigators concluded that dietary interventions restricted in carbohydrates increase LDL peak particle size and decrease the numbers of total and small LDL particles.
 
Original title:
Effect of carbohydrate-restricted dietary interventions on LDL particle size and number in adults in the context of weight loss or weight maintenance: a systematic review and meta-analysis by Falkenhain K, Roach LA, […], Little JP.

Link:
https://pubmed.ncbi.nlm.nih.gov/34159352/

Additional information of El Mondo:
Find more information/studies on cholesterol and cardiovascular disease right here.

LDL particle number (LDL-P) is a much more accurate predictor of cardiovascular disease risk than either LDL or total cholesterol. Increased LDL-P could be one of the reasons that some people have heart attacks even though their total cholesterol and LDL cholesterol levels are not particularly high.

A low-carbohydrate diet is a diet with 20-40 En% carbohydrate. The easiest way to follow a diet with 20-40 En% carbohydrate is to choose only meals/products with 20-40 En% carbohydrate. Check here which products contain 20-40 En% carbohydrate.
However, the most practical way to follow a diet with 20-40 En% carbohydrate is, all meals/products that you eat on a daily basis should on average contain 20-40 En% carbohydrate.
20-40 En% carbohydrate means that the total amounts of carbohydrates make up for a 20-40% of the total kcal of the diet.

Use the 7-points nutritional profile app to see if your daily eaten products contain on average 20-40 En% carbohydrate.

Objectives:
Studies indicate that onion supplementation may be effective in the treatment of dyslipidemia; however, the results remain controversial. Therefore, this review article has been conducted.

Does supplementation of onion improve levels of cholesterol and triglycerides or in other words, does eating onions causally lower cholesterol and triglycerides levels?  

Study design:
This review article included 10 RCTs with 446 participants, that were randomly assigned to either the placebo group or the onion group.

The number of participants in each study ranged from 12 to 92.
The duration of intervention in the included studies ranged from 2 to 12 weeks.
There was no evidence of publication bias.

Results and conclusions:
The investigators found the pooled findings of 10 studies showed that onion supplementation significantly increased high-density lipoprotein cholesterol (good cholesterol or HDL cholesterol) levels [MD = 2.29 mg/dL, 95% CI = 0.87 to 3.72, I2 = 0%], when compared to the control group.

The investigators found the pooled findings of 10 studies showed that onion supplementation significantly decreased low-density lipoprotein cholesterol (bad cholesterol or LDL cholesterol) levels [MD = -6.64 mg/dL, 95% CI = -10.91 to -2.36, I2 = 32%], when compared to the control group.
The pooled effect size of LDL cholesterol was not affected by any of the studies in sensitivity analysis.

The investigators found the pooled findings of 10 studies showed no association between onion supplementation and lower triglycerides (TG) levels [MD = -6.55 mg/dL, 95% CI = -15.64 to 2.53, I2 = 45%], when compared to the control group.

The investigators found the pooled findings of 9 studies showed that onion supplementation significantly increased total cholesterol (TC) levels [MD = -5.39 mg/dL, 95% CI = -10.68 to -0.09, I2 = 49%], when compared to the control group.

The investigators found in subgroup analysis that onion supplementation showed a greater benefit in lowering total cholesterol [MD = -17.23 mg/dL, 95% CI = -27.99 to -6.47, I2 = 8%] and LDL cholesterol levels [MD = -12.70 mg/dL, 95% CI = -23.12 to -2.27, I2 = 0%] in subjects with dyslipidemia.

The investigators found in subgroup analysis that onion supplementation longer than 10 weeks showed more increases in HDL cholesterol concentrations [MD = 2.81 mg/dL, 95% CI = 1.08 to 5.54, I2 = 17%].

The investigators concluded supplementation of onion is beneficial to control dyslipidemia, including improving levels of HDL, LDL and total cholesterol, but could not reduce triglycerides levels. The therapeutic benefits of onion for dyslipidemia need to be treated with caution considering that some of the results are not robust.

Original title:
Effect of onion on blood lipid profile: A meta-analysis of randomized controlled trials by Huang W, Tang G, [...], Wei Z.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269690

Additional information of El Mondo:
Find more information/studies on vegetable consumption, lowering cholesterol and cardiovascular disease right here.

Dyslipidemia is defined as having blood lipid levels that are too high or low. Blood lipids are fatty substances, such as triglycerides and cholesterol.

A causal relationship can be found in RCTs.

Objectives:
Personalized nutrition and protective diets and lifestyles represent a key cancer research priority. The association between consumption of specific dietary components and colorectal cancer (CRC) incidence has been evaluated by a number of population-based studies, which have identified certain food items as having protective potential, though the findings have been inconsistent. Therefore, this review article has been conducted.

Which food groups reduce risk of colorectal cancer?

Study design:
This review article included 46 studies (case-control studies and cohort studies).

Results and conclusions:
The investigators found in pooled analyses that colorectal cancer risk was significantly reduced with 10% in patients with higher vs lower consumption of cruciferous vegetables [OR = 0.90, 95% CI = 0.85 to 0.95, p = 0.00, I2 = 31.02%].
This reduced risk was only significant in case-control studies, but not in cohort studies.

The investigators found in pooled analyses that colorectal cancer risk was significantly reduced with 10% in patients with higher vs lower consumption of citrus fruits [OR = 0.90, 95% CI = 0.84 to 0.96, p = 0.00, I2 = 21.65%].
This reduced risk was only significant in case-control studies, but not in cohort studies.

The investigators found in pooled analyses that colorectal cancer risk was significantly reduced with 17% in patients with higher vs lower consumption of garlic [OR = 0.83, 95% CI = 0.76 to 0.91, p = 0.00, I2 = 32.64%].
This reduced risk was only significant in case-control studies, but not in cohort studies.

The investigators found in pooled analyses that colorectal cancer risk was significantly reduced with 11% in patients with higher vs lower consumption of tomatoes [OR = 0.89, 95% CI = 0.84 to 0.95, p = 0.00, I2 = 0%].
This reduced risk was only significant in case-control studies, but not in cohort studies.

The investigators found in subgroup analysis of cohort studies that colorectal cancer risk was significantly reduced with 26% in patients with higher vs lower consumption of nut [OR = 0.74, 95% CI = 0.58 to 0.94, p = 0.01, I2 = 35.48%].

The investigators concluded that an increased consumption of cruciferous vegetables, citrus fruits, garlic and tomatoes may reduce colorectal cancer risk. May reduce because the reduced risk is only found in case-control studies and not in cohort studies.

Original title:
Phytochemically rich dietary components and the risk of colorectal cancer: A systematic review and meta-analysis of observational studies by Borgas P, Gonzalez G, […], Reza Mirnezami R.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8223713/

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Objectives:
Is an increased homocysteine (Hcy) level an independent predictor of unfavorable outcomes in acute ischemic stroke (AIS)?

Study design:
This review article included 17 cohort studies (4 of them were retrospective studies and the remaining 13 were prospective studies) with 15,636 patients with acute ischemic stroke.

There was no publication bias.

Results and conclusions:
The investigators found the patients with acute ischemic stroke group had significantly higher levels of homocysteine than the control group [SMD = 5.11, 95% CI = 1.87 to 8.35, p = 0.002].
The results of subgroup analyses on ethnicity showed that the associations were statistically significant in both Caucasian and Asian patients [Caucasian: OR = 3.56, 95% CI = 2.54 to 4.98, p 0.00001, I2 = 20% and Asian: HR = 1.39, 95% CI = 1.19 to 1.63, p 0.00001, I2 = 86%], but not in African patients [OR = 1.04, 95% CI = 0.99 to 1.10, p = 0.11].

The investigators found, moreover, high homocysteine levels were closely associated with gender, B12 deficiency, smoking and patients who received tissue plasminogen activator treatment.
However, no significant difference was found between increased homocysteine levels and age, drinking, hypertension, diabetes mellitus and hyperlipidemia.

The investigators found, in addition, the cut-off value (20.0 μmol/L) might be an optimum cut-off index for acute ischemic stroke patients in clinical practice.

The investigators concluded that the homocysteine level may serve as an independent predictor for unfavorable survival outcomes in acute ischemic stroke patients, particularly in Caucasian and Asian acute ischemic stroke patients. Further studies can be conducted to clarify this relationship.

Original title:
The Prognostic Value of Homocysteine in Acute Ischemic Stroke Patients: A Systematic Review and Meta-Analysis by Huang S, Cai J and Tian Y.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7907516/

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Objectives:
Diets with high glycemic index (GI) or high glycemic load (GL) have been linked to important risk factors associated with the development of metabolic syndrome (MetS), such as dyslipidemia, higher blood glucose and insulin concentrations. However, the role of GI and GL in relation to metabolic syndrome is still understudied and controversial. Therefore, this review article has been conducted.

Does high dietary GI or GL increase risk of metabolic syndrome?

Study design:
This review article included 1 cohort study and 11 cross-sectional studies with a total sample size of 36,295 subjects.

Results and conclusions:
The investigators found, the pooled effect sizes from the 9 studies indicated high versus low dietary GI was significantly associated with increased risk of 5% for metabolic syndrome [OR = 1.05, 95% CI = 1.01 to 1.09, I2 = 58.1%, p = 0.004].
This finding was supported by all subgroup analyses except where studies used 24-h recalls for dietary assessment.

The investigators found, additionally, a linear dose-response investigation revealed that each 5-point increment in GI was associated with 2% increase in the risk of metabolic syndrome [OR = 1.02, 95% CI = 1.01 to 1.02].
Howver, non-linear pattern was insignificant [p-nonlinearity = 0.63].

The investigators found, moreover, pooled effect sizes from 10 studies suggested that no association was found between the GL and metabolic syndrome with results remaining consistent in all subgroup analyses.

The investigators concluded that high dietary GI increases risk of metabolic syndrome. Nutrition policy and clinical practices should encourage a diet with low GI. Future studies should include both GI and GL and different criteria of metabolic syndrome to provide a better comparison.

Original title:
Glycemic index, but not glycemic load, is associated with an increased risk of metabolic syndrome: Meta-analysis of observational studies by Askari M, Dehghani A, […], Alizadeh S.

Link:
https://pubmed.ncbi.nlm.nih.gov/33928722/

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A diet with low GI is a diet with GI of 55 or lower.

Objectives:
Low- and middle-income countries (LMICs) are currently experiencing increasing cardiovascular disease (CVD) rates. Green leafy vegetables (GLV), which are abundant in these countries, are known to be particularly rich in cardioprotective nutrients. Therefore, this review article has been conducted.

Does green leafy vegetables consumption reduce cardiovascular disease?

Study design:
This review article included 17 cohort studies.

Results and conclusions:
The investigators found green leafy vegetables consumption significantly reduced incident cardiovascular disease events with 7% [pooled RR = 0.93, 95% CI = 0.92 to 0.95].

The investigators found in subgroup analyses that green leafy vegetables consumption significantly reduced incident cerebral infarction with 8% [RR = 0.92, 95% CI = 0.88 to 0.96].

The investigators found in subgroup analyses that green leafy vegetables consumption significantly reduced heart disease with 7% [RR = 0.93, 95% CI = 0.87 to 0.99].

The investigators found in subgroup analyses that green leafy vegetables consumption significantly reduced other cardiovascular disease events with 5% [RR = 0.95, 95% CI = 0.93 to 0.98].

The investigators concluded that green leafy vegetables consumption reduces incident cardiovascular disease, particularly incident cerebral infarction and heart disease. These findings are especially important in low- and middle-income countries where the burden of cardiovascular disease remains high.

Original title:
Dietary intakes of green leafy vegetables and incidence of cardiovascular diseases by Ojagbemi A, Okekunle AP, […], Owolabi M.

Link:
https://pubmed.ncbi.nlm.nih.gov/34128951/

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The green leafy vegetables are:

arugula
beet greens
bok choy
cabbage
collard greens
endive
kale
microgreens
romaine lettuce
spinach
swiss chard
turnip greens
watercress

Objectives:
Does a high BMI increase liver cancer mortality and occurrence of primary liver cancer?

Study design:
This review article included 28 prospective cohort studies with 8,135,906 subjects, of which 6,059,561 subjects (persons) with primary liver cancer occurrence and 2,077,425 subjects with liver cancer-related mortality.

Results and conclusions:
The investigators found in the meta-analysis, that an increase in BMI significantly increased the occurrence of primary liver cancer with 69% [HR = 1.69, 95% CI = 1.50 to 1.90, I2 = 56%].
Significant means that there is an association with a 95% confidence.

The investigators found that a BMI>25 (overweight) significantly increased the occurrence of primary liver cancer with 36% [HR = 1.36, 95% CI = 1.02 to 1.81].
Significant because HR of 1 was not found in the 95% CI of 1.02 to 1.81. HR of 1 means no risk/association.

The investigators found that a BMI>30 (obesity) significantly increased the occurrence of primary liver cancer with 77% [HR = 1.77, 95% CI = 1.56 to 2.01].
Significantly means it can be said with a 95% confidence that a BMI>30 really increased the occurrence of primary liver cancer with 77%.

The investigators found that a BMI>35 significantly increased the occurrence of primary liver cancer with 208% [HR = 3.08, 95% CI = 1.21 to 7.86].

The investigators found that an increase in BMI significantly increased liver cancer-related mortality with 61% [HR = 1.61, 95% CI = 1.14 to 2.27].

The investigators concluded that high BMI increases liver cancer mortality and occurrence of primary liver cancer. Obesity (BMI>30) is an independent risk factor for the occurrence of and mortality from primary liver cancer.

Original title:
Obesity and the risk of primary liver cancer: A systematic review and meta-analysis by Sohn W, Lee S, [...], Yoon SK.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820201/

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Am I overweight?

Which products are suitable for persons with overweight?

Use the 7-points nutritional profile app to see if your daily eaten products are suitable for you if you are overweight.

Objectives:
The association of meat consumption with mortality and morbidity for non-communicable diseases has been extensively studied. However, the relation of white meat consumption with health outcomes remains controversial. Therefore, this review article has been conducted.

Does consumption of white meat reduce mortality and morbidity rate?

Study design:
This review article included 22 prospective cohort studies with 3,132,149 subjects.
11 studies (14 data-sets) reported data on all-cause mortality, 10 studies (15 datasets) on cardiovascular mortality and 10 studies (11 datasets) on non-fatal cardiovascular events.
The evaluation of methodological quality of each study showed a median NOS score of 6.

Funnel plot examination suggested the absence of publication bias and of small-study effect, confirmed by the Egger’s test for all-cause mortality.

Results and conclusions:
The investigators found the analysis of the 11 studies (14 datasets) on all-cause mortality showed a statistically significant lower mortality rate of 6% for subjects in the highest vs. lowest unprocessed white meat consumption category [OR = 0.94, 95% CI = 0.90 to 0.97, p 0.001, I2 = 95.6%, p 0.001].

The investigators found an overall neutral association between high unprocessed white meat consumption and cardiovascular mortality and morbidity.

The investigators concluded that consumption of unprocessed white meat reduces all-cause mortality.

Original title:
White Meat Consumption, All-Cause Mortality, and Cardiovascular Events: A Meta-Analysis of Prospective Cohort Studies by Lupoli R, Vitale M, […], Vaccaro O.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7924043/

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Objectives:
Excess body weight, including overweight and obesity, is one of the major factors influencing human health and plays an important role in the global burden of disease. Carotenoids serve as precursors of vitamin A-related retinoids and are considered to have potential effects on many diseases. However, the influence of carotenoids on people with excess body weight is unclear. Therefore, this review article has been conducted.

Does carotenoid supplementation reduce risk of overweight and obesity in overweight or obese subjects?

Study design:
This review article included 7 randomized controlled trials (RCTs) and 8 observational studies with 28,944 subjects and data on multiple carotenoid subgroups, including lycopene, astaxanthin, cryptoxanthin, α-carotene, and β-carotene.

In all included RCTs, the intervention duration was 20 days at the shortest and 16 weeks at the longest and the range of intervention doses was 1.2-60 mg/d.

Results and conclusions:
The investigators found that the insufficiency of serum carotenoids significantly increased risk of overweight and obesity with 73% [OR = 1.73, 95% CI = 1.57 to 1.91, p 0.001].

The investigators found, moreover, carotenoid supplementation was significantly associated with body weight reductions [SMD = -2.34 kg, 95% CI = -3.80 to -0.87 kg, p 0.001], body mass index decrease [SMD = -0.95 kg/cm², 95% CI = -1.88 to -0.01 kg/cm², p 0.001] and waist circumference losses [SMD = -1.84 cm, 95% CI = -3.14 to -0.54 cm, p 0.001].

The investigators concluded that 1.2-60 mg/d carotenoid supplementation reduces risk of overweight and obesity in overweight or obese subjects. Furthermore, an insufficiency of serum carotenoids is a risk factor for overweight and obesity. Additional data from large clinical trials are needed.

Original title:
The association between carotenoids and subjects with overweight or obesity: a systematic review and meta-analysis by Yao N, Yan S, […], Cui W.

Link:
https://pubmed.ncbi.nlm.nih.gov/33977977/

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Am I overweight?
 

Objectives:
The evidence on the association between obesity and atrial fibrillation (AF) recurrence was equivocal. Therefore, this review article (meta-analysis) has been conducted.

Does obesity increase risk of atrial fibrillation recurrence in patients undergoing catheter ablation?

Study design:
This review article included 20 studies with 52,771 patients.

Results and conclusions:
The investigators found that obesity was significantly associated with higher atrial fibrillation recurrence [OR = 1.30, 95% C = 1.16 to 1.47, p 0.001, I2 = 72.7%] and similar rate of adverse events [OR = 1.21, 95% CI = 0.87 to 1.67, p = 0.264, I2 = 23.9%] in patients undergoing catheter ablation.

The investigators found meta-regression showed that the association varied by age [coefficient = -0.03, p = 0.024].

The investigators found meta-analysis of highest versus lowest BMI showed that the highest group had higher atrial fibrillation recurrence [OR = 1.37, 95% CI = 1.18 to 1.58, p 0.001, I2 = 64.9%] and adverse events [OR = 2.02, 95% CI = 1.08 to 3.76, p = 0.028, I2 = 49.5%] in patients undergoing catheter ablation.

The investigators found the dose-response relationship for BMI and atrial fibrillation recurrence was nonlinear [p nonlinearity 0.001], the curve became steeper at 30-35 kg/m².

The investigators found for adverse events, an increase of 1% for every 1 kg/m² increase in BMI [OR = 1.01, 95% CI = 1.00 to 1.02, p = 0.001], the relationship was nonlinear [p nonlinearity = 0.001].

The investigators concluded that obesity is associated with higher atrial fibrillation recurrence in patients undergoing catheter ablation. High BMI is associated with a higher risk for adverse events.

Original title:
BMI and atrial fibrillation recurrence post catheter ablation: A dose-response meta-analysis by Pranata R, Henrina J, […], Munawar M.

Link:
https://pubmed.ncbi.nlm.nih.gov/33544873/

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Catheter ablation is a procedure that uses radiofrequency energy (similar to microwave heat) to destroy a small area of heart tissue that is causing rapid and irregular heartbeats. Destroying this tissue helps restore your heart’s regular rhythm. Catheter ablation is also called radiofrequency ablation.

Am I overweight?
 

Objectives:
Does carotenoid (like astaxanthin, lutein/zeaxanthin, β-cryptoxanthin and lycopene) supplementation have protective effects on inflammatory biomarkers (like C-reactive protein and interleukin-6)?

Study design:
This review article included 26 RCTs with 35 effect sizes.

Results and conclusions:
The investigators found carotenoid supplementation significantly reduced C-reactive protein (CRP) [WMD = -0.54 mg/L, 95% CI = -0.71 to -0.37, p 0.001].
Significantly because the calculated p-value of 0.001 was less than the p-value of 0.05.

The investigators found carotenoid supplementation significantly reduced interleukin-6 (IL-6) [WMD = -0.54 pg/mL, 95% CI = -1.01 to -0.06, p = 0.025].
Significant means that there is an association with a 95% confidence.

The investigators found in subgroup analyses that astaxanthin supplementation significantly reduced C-reactive protein (CRP) [WMD = -0.30 mg/L, 95% CI = -0.51 to -0.09, p = 0.005].

The investigators found in subgroup analyses that lutein/zeaxanthin supplementation significantly reduced C-reactive protein (CRP) [WMD = -0.30 mg/L, 95% CI = -0.45 to -0.15, p 0.001].

The investigators found in subgroup analyses that β-cryptoxanthin supplementation significantly reduced C-reactive protein (CRP) [WMD = -0.35 mg/L, 95% CI = -0.54 to -0.15, p 0.001].

The investigators found in subgroup analyses that lycopene supplementation significantly reduced interleukin-6 (IL-6) [WMD = -1.08 pg/mL, 95% CI = -2.03 to -0.12, p = 0.027].

The investigators concluded that carotenoid supplementation (like astaxanthin, lutein/zeaxanthin, β-cryptoxanthin and lycopene) has protective effects on inflammatory biomarkers.

Original title:
Carotenoids supplementation and inflammation: a systematic review and meta-analysis of randomized clinical trials by Hajizadeh-Sharafabad F, Zahabi ES, […], Alizadeh M.

Link:
https://pubmed.ncbi.nlm.nih.gov/33998846/

Additional information of El Mondo:
Find here more information/studies about review article/significant, carotenoid and inflammation.
 

Objectives:
A few randomized controlled trials (RCTs) have assessed the effect of brown rice consumption on metabolic parameters (such as, weight, height, waist circumference, fasting glucose, LDL, HDL, total cholesterol, triglycerides and blood pressure) compared to white rice, with inconsistent findings. Therefore, this review article has been conducted.

Is the effect of brown rice on adiposity indices (such as, weight, height and waist circumference), lipid profile (such as, LDL, HDL, total cholesterol and triglycerides) and glycemic markers (such as, fasting blood glucose) higher compared to white rice in adult subjects?

Study design:
This review article included 13 RCTs.
In accordance with Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach, the certainly of the included evidence was low and very low.

Results and conclusions:
The investigators found brown rice significantly reduced:
weight by -1.63 kg [95% CI = -2.15 to -1.11, I2 = 97%, n = 6];
body mass index (BMI) by -0.58 kg/m² [95% CI = -0.78 to -0.37, I2 = 96%, n = 6] and;
waist circumference by -2.56 cm [95% CI = -4.86 to -0.26, I2 = 88%, n = 5] compared with white rice.

The investigators found, moreover, brown rice had no significant effect on lipid profile and glycemic markers.

The investigators found pre-germinated brown rice significantly declined:
weight by -1.75 kg [95% CI = -2.70 to -0.81, I2 = 99%, n = 4];
total cholesterol by -24.22 mg/dL [95% CI = -33.03 to -15.41, I2 = 78%, n = 5];
triglyceride (TG) by -43.28 mg/dL [95% CI = -74.05 to -12.50, I2 = 90%, n = 5];
low-density lipoprotein (LDL or bad cholesterol) by -20.05 mg/dL [95% CI = -29.57 to -10.52, I2 = 71%, n = 5] and;
fasting blood glucose (FBG) by -15.83 mg/dL [95% CI = -25.20 to -6.46, I2 = 91%, n = 5] compared to white rice.

The investigators concluded brown rice has anti-obesity effects in comparison with white rice. However, it has no beneficial effects on lipid profile and glycemic markers. Furthermore, pre-germinated brown rice has better functional effects on promoting lipid profile and fasting blood glucose compared to brown rice.

Original title:
The effect of brown rice compared to white rice on adiposity indices, lipid profile, and glycemic markers: a systematic review and meta-analysis of randomized controlled trials by Golzarand M, Toolabi K, […], Mirmiran P.

Link:
https://pubmed.ncbi.nlm.nih.gov/33905269

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Objectives:
Does coffee or tea consumption reduce the risk of glioma?

Study design:
This review article included 12 unique studies (cohort and case-control studies) comprising of 1,960,731 participants with 2,987 glioma cases.

Results and conclusions:
The investigators found in pooled analyses that higher tea consumption was significantly associated with a lower risk of 16% for glioma [RR = 0.84, 95% CI = 0.71 to 0.98, p = 0.030, I2 = 16.42%].

The investigators found in cohort studies that higher coffee consumption was significantly associated with a lower risk of 15% for glioma [RR = 0.85, 95% CI = 0.72 to 1.00, p = 0.046, I2 = 0%].

The investigators found in cohort studies that higher tea consumption was significantly associated with a lower risk of 19% for glioma [RR = 0.81, 95% CI = 0.70 to 0.93, p = 0.004, I2 = 0%].

The investigators found in dose-response meta-analysis that every one cup of coffee per day significantly decreased the risk of glioma by 3% [RR = 0.97, 95% CI = 0.94 to 0.99, p = 0.016, p non-linearity = 0.054]. 

The investigators found in dose-response meta-analysis that every one cup of tea per day significantly decreased the risk of glioma by 3% [RR = 0.97, 95% CI = 0.94 to 1.00, p = 0.048]. 

The investigators found meta-regression showed that the association between coffee and glioma was reduced by smoking [p = 0.029].

The investigators concluded both coffee (at least one cup of coffee per day) and tea consumption (at least one cup of tea per day) reduce the risk of glioma.

Original title:
Coffee and tea consumption and the risk of glioma: a systematic review and dose-response meta-analysis by Pranata R, Feraldho A, […], July J.

Link:
https://pubmed.ncbi.nlm.nih.gov/33750490/

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Glioma is a type of tumor that occurs in the brain and spinal cord. About 33 percent of all brain tumors are gliomas, which originate in the glial cells that surround and support neurons in the brain, including astrocytes, oligodendrocytes and ependymal cells.
Gliomas can affect all ages, but they are most often seen in adults. Gliomas are slightly more likely to occur in men than in women and more common in Caucasians than in African Americans.

Objectives:
The associations of alcohol consumption and venous thromboembolism (VTE) have been investigated widely, but the conclusions were inconsistent. Therefore, this review article has been conducted.

Does alcohol intake decrease risk of venous thromboembolism?

Study design:
This review article included 14 cohort studies and 4 case-control studies.

Results and conclusions:
The investigators found, compared with non-drinkers, the risk of venous thromboembolism was significantly decreased with 7% [RR = 0.93, 95% CI = 0.88 to 0.99] for alcohol drinkers.

The investigators found, compared with no alcohol intake, the risk of venous thromboembolism was significantly decreased with 9% [RR = 0.91, 95% CI = 0.84 to 0.99] for low to moderate alcohol intake (0.1-14.0 drinks/week).

The investigators concluded that low to moderate alcohol intake (0.1-14.0 drinks/week) decreases risk of venous thromboembolism. However, precautions are needed when providing personal drinking advice considering the potential harm of alcohol. Further studies are warranted to determine whether moderate alcohol consumption has a causal role in venous thromboembolism.

Original title:
Meta-analysis of alcohol consumption and venous thromboembolism by Zhang X, Chen X, [...], Li K.

Link:
https://pubmed.ncbi.nlm.nih.gov/33824981/

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Objectives:
Dyslipidemia/hyperlipidemia is recognized among the risk factors for lifestyle related diseases. A healthy diet, rich in vegetable oils such as rice bran oil (RBO), may aid to improve serum lipid levels. Therefore, this review article has been conducted.

Does rice bran oil decrease causally the levels of serum total cholesterol (TC), low-density lipoprotein cholesterol (LDL-c), high-density lipoprotein cholesterol (HDL-c) and triglyceride (TG) levels in adults?

Study design:
This review article included 8 eligible RCTs with 14 effect sizes.
The effect sizes were expressed as weighted mean difference (WMD) with 95% confidence intervals (CI).
 
Results and conclusions:
The investigators found that the consumption of rice bran oil significantly decreased serum
total cholesterol [WMD = -7.29 mg/dL, 95% CI = -11.32 to -3.25, p = 0.000];
LDL- cholesterol (bad cholesterol) [WMD = -7.62 mg/dL, 95% CI = -11.10 to -4.14, p = 0.000] and;
triglyceride [WMD = -9.19 mg/dL, 95% CI = -17.99 to -0.38, p = 0.041] levels in adults.
Significantly because the calculated p-value of = 0.041 was less than the p-value of 0.05.

The investigators concluded that the consumption of rice bran oil causally decreases serum
total cholesterol, LDL-cholesterol (bad cholesterol) and triglyceride levels in adults. Hence, it may play a role in reducing dyslipidemia/hyperlipidemia risk.

Original title:
The impact of rice bran oil consumption on the serum lipid profile in adults: a systematic review and meta-analysis of randomized controlled trials by Pourrajab B, Sohouli MH, […], Shidfar F.

Link:
https://pubmed.ncbi.nlm.nih.gov/33715544/

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