Voeding en gezondheid

Gefrituurde producten verhogen mogelijk prostaatkanker

Research Question:
Eating fried products increases the chance of getting prostate cancer?

Study Design:
This overview article contain 4 case-control studies with a total of 2572 prostate cancer patients and 2277 matched controls.

Results and conclusions:
The researchers found that eating a lot of fried products, the chance of getting prostate cancer significantly with 35% [RR = 1.35, 95% CI = 1.17-1.57] increased.

The researchers concluded that eating a lot of fried products, the chance of getting prostate cancer may be increased. Possible because the overview article not only case-control studies and cohort studies.

Original title:
Fried food and prostate cancer risk: systematic review and meta-analysis by Lippi Mattiuzzi G and C.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/26114920

Additional information about El Mondo:
Read here more studies on prostate cancer.

The results found in case-control studies are less reliable than cohort studies because in case-control studies are more sensitive to errors than cohort studies. In other words, the (lowering or increasing) effect found in case-control studies should always be confirmed in cohort studies before a comment can be made.

 

Vitamine E via voeding verlaagt longkanker

Research Question:
The relationship between the intake of vitamin E and the risk of getting lung cancer is still contradictory. It was therefore carried out this review article.

Eating vitamin E lowers the chances of getting lung cancer?

Study Design:
This overview article contained 10 prospective cohort studies and 1 case-control study with a total of 4434 lung cancer cases.

There was no question of publication bias.

Results and conclusions:
The researchers found in the 11 studies that eating a lot of vitamin E the chances of getting lung cancer significantly with 14.2% [RR = 0.858, 95% CI = 0.742-0.99, I2 = 47.3%, p = 0.041] reduced.

The researchers found that eating a lot of vitamin E the chances of getting lung cancer among Americans significantly with 13.8% [RR = 0.862, 95% CI = 0715-0.996] reduced.

The researchers found in 10 prospective cohort studies that eating a lot of vitamin E the chances of getting lung cancer significantly with 8.7% [RR = 0.913, 95% CI = 0.827-0.996] reduced.

The researchers concluded that eating a lot of vitamin E the chance of getting longerkanker, particularly among Americans reduced.

Original title:
Dietary vitamin E intake could reduce the risk of lung cancer: evidence from a meta-analysis by Chen G, Wang J, [...], Li Q.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4483938/

Additional information about El Mondo:
Read here more studies on vitamin E.
 

Dagelijks 580 mg DHA of 1 gram DHA en EPA verbetert het geheugen van ouderen

Research Question:
Improves swallowing DHA the memory of the elderly?

Study Design:
This overview article contained 15 intervention studies (with an average duration of 4-6 months. The age of the participants was above 45 years) and 13 observational studies. 

Results and conclusions:
The researchers found that swallowing of DHA with or without EPA increased significantly [p 0.004] the episodic memory of people with mild memory problems.

The researchers found that swallowing or grams of DHA and EPA per day, significantly improved memory.

The researchers found that swallowing of at least 580 mg of DHA per day, the episodic memory of both people with mild memory problems as people without memory problems significantly increased.

The researchers found in observational studies support the broad role of DHA/EPA-intake and the positive effects on memory in people over 45 years.

The researchers concluded that DHA (580 mg or higher) with or without EPA (1 grams of DHA and EPA or higher) the episodic memory of people with mild memory problems improved.

Original title:
Docosahexaenoic Acid and Adult Memory: A Systematic Review and Meta-Analysis by Paul-Mauro K, Alexander DD and Van Elswyk ME.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4364972/

Additional information about El Mondo:
Find here more studies on DHA and EPA and prevent memory problems. What fish more than 580 mg of DHA, you can look up here.

The episodic memory is the memory for events that have taken place in the past. The episodic memory develops from the third year. This is the reason that we have no memory for our third year of life. On the other hand, does the emotional memory have from birth.

60 gram vis per dag verlaagt de all-cause mortalieit

Summary:
The researchers found in an overview article of 12 prospective cohort studies with 672389 57641 deaths among participants, that eating a lot of fish the chance of death to all causes significantly with 6% reduced.

Research Question:
Although fish consumption impact on chronic disease-related mortality, the relationship between eating fish and all-cause mortality inconsistent. It was therefore carried out this review article.

Lowers the chance of eating fish death to all causes (all-cause mortalieit)?

Study Design:
This overview article contained 12 prospective cohort studies with 672389 participants, of which 57641 deaths.

Results and conclusions:
The researchers found the highest fish consumption group compared to the lowest, a significantly reduced risk of all-cause mortality by 6% [RR = 0.94, 95% CI = 0.90-0.98, I2 = 39.1%, p = 0.06].  

The researchers found a non-linear relationship between eating fish and all-cause mortality.

The researchers found that eating 60 grams of fish per day significantly the risk of all-cause mortality with 12% [RR = 0.88, 95% CI = 0.83-0.93] reduced.        

The researchers concluded that eating a lot of fish (at least 60 grams per day) reduced the risk of all-cause mortiliteit.

Original title:
Fish consumption and all-cause mortality: a meta-analysis of cohort studies by Zhao LG, JW, Sun [...], Xiang YB.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25969396

Additional information about El Mondo:
Find here more studies on eating fish.

Dagelijks 150 mg vitamine C via voeding verlaagt prostaatkanker

Research Question:
Eating vitamin C lowers the chances of getting prostate cancer?

Study Design:
This overview article contained 18 studies (6 cohort and case-control studies 12) with a total of 103658 participants.

Results and conclusions:
The researchers found that eating a lot of vitamin C, the chance of getting prostate cancer significantly with 11% [RR = 0.89, 95% CI = 0.83-0.94, p = 0.000, I2 = 39.4%, p = 0.045] reduced.

The researchers found in cohort studies that eating a lot of vitamin C, the chance of getting prostate cancer significantly with 8% [RR = 0.92, 95% CI = 0.86-0.99, p = 0.215] reduced.

The researchers found in case-control studies that eating a lot of vitamin C, the chance of getting prostate cancer significantly with 20% [RR = 0.80, 95% CI = 0.71-0.89, p = 0.000] reduced.

The researchers found in cohort studies that eating 150 mg vitamin C per day, the chance of getting prostate cancer significantly with 5% [RR = 0.95, 95% CI = 0.90-0.99, p = 0.039] reduced.

The researchers found in case-control studies that eating 150 mg vitamin C per day, the chance of getting prostate cancer significantly with 21% [RR = 0.79, 95% CI = 0.69-0.91, p = 0.001] reduced.

The researchers concluded that eating 150 mg of vitamin C per day, reduced the chance of getting prostate cancer.

Original title:
Association between Dietary Vitamin C Intake and Risk of Prostate Cancer: A Meta-analysis Involving 103,658 Subjects by Bai XY, Qu X, [...], Wu H.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4532989/

Additional information about El Mondo:
Read here more studies on vitamin C and prostate cancer.

The results found in case-control studies are less reliable than cohort studies because in case-control studies are more sensitive to errors than cohort studies. In other words, the (lowering or increasing) effect found in case-control studies should always be confirmed in cohort studies.
 

Vrouwen met zwangerschapdiabetes hebben minder selenium in het lichaam

Research Question:
Women with gestational diabetes have less selenium in the body?

Study Design:
This overview article contained 6 observational studies with 147 women with gestational diabetes and 360 women without gestational diabetes.

Results and conclusions:
The researchers found that women with gestational diabetes had a lower serum selenium concentration than women without gestational diabetes [Hedges =-1.34, 95% CI =-2.33 to-0.36, p 0.01].  However, the difference was only signficant in the third trimester [Hedges =-2.81, 95% CI =-5.21 to-0.42, p 0.05].

The researchers found that pregnant women with impaired glucose tolerance had a lower serum selenium concentration than pregnant women with a normal blood sugar levels [Hedges =-0.85, 95% CI = 1.18-to-0.52]. 

The researchers concluded that pregnant women with elevated blood sugar less selenium, especially in the third trimester in the body than pregnant women with a normal blood sugar levels.

Original title:
The association between serum selenium and gestational diabetes mellitus: A systematic review and meta-analysis by Askaria G, Irajb B, [...], Jafaria T.

Link:
http://www.sciencedirect.com/science/article/pii/S0946672X14001758

Additional information about El Mondo:
Find here more studies on selenium.
How many kilos of a woman during pregnancy should arrive, you can look up here.

Knoflooksupplementen verlagen de bloeddruk

Research Question:
Swallowing garlic supplements lowers the blood pressure?

Study Design:
This overview article contained 17 Rcts.

Results and conclusions:
The researchers found that garlic supplements the systolic blood pressure significantly with 3.75 mmHg [95% CI =-5.04 to-2.45, I2 = 30.7%, p 0.001] reduced.

The researchers found that garlic supplements the diastolic blood pressure significantly with 3.39 mmHg [95% CI =-4.14 to-2.65, I2 = 67% p 0.001] reduced.

The researchers found in the subgroup analysis that garlic supplements the systolic blood pressure in patients with high blood pressure with 4.4 mmHg [95% CI =-7.37 to-1.42, I2 = 0.0%, p = 0.008] reduced, but not in people with normal blood pressure.

The researchers found in the sensitivity analysis in which the heterogeneity disappeared, that garlic supplements the diastolsiche blood pressure in patients with high blood pressure significantly with 2.68 mmHg [95% CI =-5.99 to-0.42, I2 = 0.0%, p = 0.020] reduced.

The researchers concluded that garlic supplements reduced blood pressure, especially in people with high blood pressure.

Original title:
Effect of Garlic on Blood Pressure: A Meta-Analysis by Wang HP, Yang J, [...], Yang XJ.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25557383

Additional information about El Mondo:
Find here more studies on garlic and prevent high blood pressure.
Read more about overview article, Rcts, 95% CI and subgroup analysis.

200 gram groenten per dag verlaagt blaaskanker

Research Question:
Eating fruits and vegetables lowers the chances of getting bladder cancer?

Study Design:
This overview article 15 contained 12 cohort studies and case-control studies.

Results and conclusions:
The researchers found that eating lots of vegetables compared to little, the chances of getting bladder cancer significantly with 16% [RR = 0.84, 95% CI = 0.72-0.96] reduced.

The researchers found that eating a lot of fruit compared to little, the chances of getting bladder cancer significantly with 19% [RR = 0.99, 95% CI = 0.73-0.89] reduced.

The researchers found that eating 200 g of vegetables a day, the chances of getting bladder cancer significantly with 8% [RR = 0.92, 95% CI = 0.87-0.97] reduced.

The researchers found that eating 200 grams of fruit per day, the chances of getting bladder cancer significantly with 9% [RR = 0.91, 95% CI = 0.83-0.99] reduced.

The researchers concluded that eating 200 g of vegetables or 200 grams of fruit per day, the chances of getting bladder cancer reduced.

Original title:
Fruit and vegetable consumption and risk of bladder cancer: an updated meta-analysis of observational studies by Liu H, Wang XC, [...], Xu YF.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25642791

Additional information about El Mondo:
Find here more studies on the occurrence of cancer and the protective effect of fruits and vegetables.

These meals contain 200 grams 200 grams of vegetables and fruit.

Veel vitamine C via voeding verlaagt staar

Research Question:
Or vitamin C a protective factor for age-related cataract is, remains unclear. It was therefore carried out this review article.

Vitamin C lowers the chances of getting age-related cataract (cataracts)?

Study Design:
This overview article contained 20 studies on vitamin C intake and 10 studies on serum ascorbaatgehalte (= the vitamin C content in the body). 

Results and conclusions:
The researchers found a high vitamin C intake compared to a low, a significantly reduced risk of 18.6% [RR = 0.814, 95% CI = 0.578-0.231] for age-related cataract. This significantly reduced risk was found in both America and Asia.

The researchers found a high serum ascorbaatgehalte compared to a layer, a significantly reduced risk of 29.6% [RR = 0.564-0704, 95% CI = 0.879] for age-related cataract. This significantly reduced risk was both in nuclear cataract Subcapsular cataract as found.

The researchers concluded that both high vitamin C intake as a high serum ascorbaatgehalte, reduced the chance of getting age-related cataract.

Original title:
Association of vitamin C with the risk of age-related cataract: a meta-analysis by Wei L, Liang G, [...], Lv J.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25735187

Additional information about El Mondo:
Find here more studies vitamin C.
A vitamin C-rich meal contains at least 100 mg of vitamin c. These meals are rich in vitamin C.

Vegetarisch dieet leidt tot gewichtsverlies

Research Question:
Vegetarian diets can promote weight loss, however the evidence is ambiguous. It was therefore carried out this review article.

Following a vegetarian diet leads to weight loss?

Study Design:
This overview article contained 12 Rcts with a total of 1151 people that a vegetarian diet with an average maturity of 18 weeks.

Results and conclusions:
The researchers found that people who followed a vegetarian diet lost significantly more weight than those who do not vegetarian diet followed [weighted average difference =-2.02 kg, 95% CI =-2.80 to-1.23].

The researchers found in the subgroup analysis (to get more information) that the weight loss in a vegan diet significantly 2.52 kg [95% CI = 3.02-to-1.98] but at a lacto-ovo diet not significant 1.48 kg [95% CI =-3.99 to 0.47] amounted to.

The researchers found in the subgroup analysis that people who followed a vegetarian diet with energy restriction lost significantly more weight than those followed a vegetarian diet without energy restriction [2.21 kg, 95% CI =-3.31 to-1.12 versus 1.66 kg, 95% CI =-2.85 to-0.59]. 

The researchers found in the subgroup analysis that following a vegetarian diet of less than 1 year led to more weight loss than following a vegetarian diet longer than 1 year [-2.05 kg, 95% CI =-2.85 to-1.25 versus-1.13 kg, 95% CI =-2.04 to-0.21].

The researchers concluded that following a vegetarian diet with an average maturity of 18 weeks to a weight loss of 2.02 kg. Most weight loss was achieved with a vegan diet with energy restriction.

Original title:
Vegetarian Diets and Weight Reduction: a Meta-Analysis of Randomized Controlled Trials by Huang RY, Huang CC, [...], Chavarro you.

Link:
http://onlinelibrary.wiley.com/doi/10.1111/obr.12067/abstract

Additional information about El Mondo:
Read here about being overweight.
Read more about vegetarian diet.
Only a vegetarian diet leads to weight loss and return of the diet in addition also low fat and high fiber.

A vegetarian is generally defined as someone who does not eat meat. But there are several versions and degrees of vegetarian. For example, there are:

Lacto-ovo vegetarians:
A lacto-ovo vegetarian doesn't eat meat, fish or poultry, but eggs, milk and cheese. This is the most common type of vegetarian. A lacto vegetarian or eat milk and cheese products but no eggs while an ovo-vegetarian right again no cheese and milk products but eat eggs.

Pescotariërs and pollotariërs:
A pescotariër do not eat meat, poultry and dairy, but fish while a pollotariër not eat meat, fish and dairy, but poultry, particularly chicken.

Vegans:
Vegans eat no animal products or by-products or use. They eat only vegetables, fruits, nuts, grains and legumes. They also eat no foods where animal products are processed. So, for example, they eat nothing with animal oils is prepared, no mayonnaise because there's egg in and no products with certain E-numbers in it because there for example bone marrow (as in the E number gelatin) in May. Vegans also make no use of utensils in which animal materials. So for example, vegans bear no learning (only cotton shoes and belts, etc.) and also no wool products.

Fruit Aryans and raw food-trailer:
This group of vegetarians is not often. A fruit MEP eat only fruit and nuts. They eat nothing where a plant for should be killed, so only the fruits that can be picked. The reasoning is that this way of eating the most in balance and harmony with the Earth and nature.
A raw food follower eat only raw foods, so only vegetables, fruit, nuts and legumes. According to them disappear the nutritional values from eating when they are purchased.

 

 

22-536 mg vitamine E per dag verlaagt een hartinfarct

Research Question:
Swallowing of vitamin E reduces the chance of getting a heart attack?

Study Design:
This overview article contained 16 Rcts. The dosage ranged between 33 and 800 IU of vitamin e. the follow-up duration ranged between 0.5 and 9.4 years.
1 IU of vitamin E is approximately:

  • 1 mg dl-α tocopherol acetate
  • 0.91 mg dl-α tocopherol
  • 0.67 mg d-α tocopherol (vitamin E in people's mouth)
  • 1.12 mg dl-α tocoferolwaterstofsuccinaat

Results and conclusions:
The researchers found that swallowing vitamin E the chance of getting a heart attack significantly with 18% [RR = 0.82, 95% CI = 0.70-0.96, p = 0.01] reduced.

The researchers found that swallowing vitamin E the chance of getting a fatal heart attacks significantly with 16% [RR = 0.84, 95% CI = 0.73-0.96, p = 0.01] reduced.

The researchers concluded that swallowing 33-800 IE (22.11-536 mg) vitamin a day, reduced the risk of getting a heart attack. However, this reduced risk disappeared when vitamin E was combined with other antioxidants. 

Original title:
Supplementation with vitamin e alone is associated with reduced myocardial infarction: a meta-analysis by Loffredo L, Perri L, [...], Violi f.

Link:
http://www.nmcd-journal.com/article/S0939-4753%2815%2900024-1/abstract

Additional information about El Mondo:
Find here more studies on vitamin E and prevent a heart attack.

Een laag vitamine B12-gehalte verhoogt leeftijdsgebonden maculaire degeneratie

Research Question:
There are conflicting results about the association between plasma homocysteine (tHcy) and the vitamin B content and getting the age-related macular degeneration (AMD). It was therefore carried out this review article.

Raise a high homocysteine and low vitamin B content the chance of getting the age-related macular degeneration?

Study Design:
This overview article contained 11 studies on homocysteine levels with a total of 1072 cases with age-related macular degeneration and 1202 cases without age-related macular degeneration and 3 studies on folic acid and vitamin B12 levels with a total of 152 cases with age-related macular degeneration and 98 cases without age-related macular degeneration.

Results and conclusions:
The researchers found that homocysteine levels of people with age-related macular degeneration signficant 2.67 μmol/L [95% CI = 1.60-3.74, I2 = 92%, p 0.00001] was higher than of people without age-related macular degeneration.

The researchers found that vitamin B12 levels of people with age-related macular degeneration 64.16 pg/mL [95% CI = 19.32-109.00, I2 = 35%, p = 0.19] was lower than of people without age-related macular degeneration.

The researchers found that the folic acid content of people with the wet form of age-related macular degeneration 1.66 ng/mL [95% CI = 0.10-3.99] was lower than of people without age-related macular degeneration.

The researchers concluded that a high homocysteine or low vitamin B12 levels the chance of getting the increased age-related macular degeneration.

Original title:
Homocysteine and the risk of age-related macular degeneration: a systematic review and meta-analysis by Huang P, Wang F, [...], Sun X.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4508850/

Additional information about El Mondo:
Find here more studies about lowering homocysteine levels and raising the folic acid and vitamin B12 levels.

100 gram vis per week verlaagt leverkanker

Research Question:
Eating fish reduces the chances of getting liver cancer?

Study Design:
This overview article contained 5 retrospective patient-control studies and 5 prospective cohort studies with a total of 3624 liver cancer patients.

Results and conclusions:
The researchers found in case-control studies that eating a lot of fish compared to little, the chances of getting liver cancer are not significantly by 21% [RR = 0.79, 95% CI = 0.59-1.06] reduced.

The researchers found in cohort studies that eating a lot of fish compared to little, the chances of getting liver cancer significantly with 18% [RR = 0.82, 95% CI = 0.70-0.96] reduced.

The researchers found when all studies were combined, that eating a lot of fish compared to little, the chances of getting liver cancer significantly with 18% [RR = 0.82, 95% CI = 0.71-0.94, I2 = 12.8%, p = 0.33] reduced.

The researchers found that the reduced risk remained significant in both stratified as sensitivity analyses.

The researchers found that 1 serving of fish per week the chance of getting leverkaner significantly with 6% [RR = 0.94, 95% CI = 0.91-0.98, I2 = 0.0%, p = 0.74] reduced.

The researchers concluded that eating 1 serving (100 grams) of fish per week reduced the chances of getting liver cancer.

Original title:
Fish intake and risk of liver cancer: a meta-analysis by Huang RX, Duan YY and Hu Yes.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4304705/

Additional information about El Mondo:
Find here more studies on the occurrence of cancer and fish consumption.

 

Veel foliumzuur, vitamine D, B6 en B2 via voeding verlaagt dikke darmkanker

Research Question:
Eating vitamins lowers the chances of getting colon cancer?

Study Design:
This overview article contained 74 articles (cohort studies).

Results and conclusions:
The researchers found the highest folate intake via diet compared with the lowest intake, a significantly reduced risk of 12% [multivariable-adjusted RR = 0.88, 95% CI = 0.81-0.95] for colon cancer.

The researchers found the highest vitamin D intake through diet compared with the lowest intake, a significantly reduced risk of 13% [multivariable-adjusted RR = 0.87, 95% CI = 0.77-0.99] for colon cancer.

The researchers found the highest vitamin B6 intake via diet compared with the lowest intake, a significantly reduced risk of 12% [multivariable-adjusted RR = 0.88, 95% CI = 0.79-0.99] for colon cancer.

The researchers found the highest vitamin B2 intake via diet compared with the lowest intake, a significantly reduced risk of 14% [multivariable-adjusted RR = 0.86, 95% CI = 0.76-0.97] for colon cancer.

However, the researchers found no link between vitamin A, B12, C, or E-intake via diet and the risk of getting colon cancer.

The researchers concluded that eating a lot of folic acid, vitamin D, B6 and B2 the chance of getting colon cancer reduced.

Original title:
Vitamin and multiple-vitamin supplement intake and incidence of colorectal cancer: a meta-analysis of cohort studies by Liu Y, Yu Q, [...], Li k.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25491145

Additional information about El Mondo:
Find here more studies on colon cancer and vitamins.
This meal contains a lot of vitamin D and B6.

Dagelijks 300 gram fruit of 400 gram groenten verlaagt coronaire hartziekte

Research Question:
Observational studies suggest an association between fruit and vegetable consumption and coronary heart disease (CHD). However, the results are inconsistent. It was therefore carried out this review article.

Eating fruits and vegetables lowers the chances of getting coronary heart disease?

Study Design:
This overview article contained 23 prospective studies with 937665 participants, of which 18047 patients with coronary artery disease.

Results and conclusions:
The researchers found that eating lots of fruits and vegetables the chance of getting a coronary heart disease significantly with 16% [RR = 0.84, 95% CI = 0.79-0.90] reduced.

The researchers found that eating lots of fruits the chance of getting a coronary heart disease significantly with 14% [RR = 0.86, 95% CI = 0.82-0.91] reduced.

The researchers found that eating lots of vegetables the chance of getting a coronary heart disease significantly with 13% [RR = 0.87, 95% CI = 0.81-0.93] reduced.

The researchers found that eating 477 grams of fruit and vegetables per day the chances of getting coronary artery disease significantly with 12% [RR = 0.88, 95% CI = 0.85-0.91] reduced.

The researchers found that eating 300 grams of fruit per day the chances of getting coronary artery disease significantly with 16% [RR = 0.84, 95% CI = 0.75-0.93] reduced.

The researchers found that eating 400 g of vegetables per day the chances of getting coronary artery disease significantly with 18% [RR = 0.82, 95% CI = 0.73-0.92] reduced.

The researchers found in the subgroup analysis that eating fruits and/or vegetables the chances of getting coronary artery disease among Europeans but not under Asians reduced.

The researchers concluded that eating vegetables and/or fruit the chance of getting a reduced coronary artery disease, especially among Asians.

Original title:
Or fruit and vegetable consumption and risk of coronary heart disease: A meta-analysis of prospective cohort studies by Gan Y, Tong X, [...], Lu Z.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25662075

Additional information about El Mondo:
Find here more studies on eating fruits and vegetables and heart disease.

Een zinktekort leidt tot hartinfarct

Research Question:
A zinc deficiency increases the chance of getting a heart attack?

Study Design:
This overview article contained 41 case-control studies with 2886 participants.

Results and conclusions:
The researchers found that patients who had a heart attack have low zinc status (less zinc in the body) [SMD =-1,148, 95% CI =-2,365 to-1,331] had than healthy people. 

The researchers found in the subgroup analysis that patients who have had a heart attack a low serum zinc status [SMD =-1,764, 95% CI =-2,417 to-1.112] had than healthy people. 

The researchers found in the subgroup analysis that patients who have had a heart attack her a low zinc status [SMD =-3.326, 95% CI = 4.616-to-2.036] had than healthy people. 

The researchers found that both men in the subgroup analysis [SMD =-3,350, 95% CI =-149 to-1,348] and women [SMD =-1,652, 95% CI =-3,440 to-1922] who have had a heart attack had a low zinc status than healthy people.

The researchers found in the subgroup analysis that the zinc status in Asian patients who have had a heart attack, lower than in European patients.

The researchers concluded that there is a significant relationship existed between zinc deficiency and getting a heart attack.

Original title:
Deficient Zinc Levels and Myocardial Infarction: Association Between Deficient Zinc Levels and Myocardial Infarction: a Meta-analysis by Liu B, Cai ZQ and Zhou YM.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25627421

Additional information about El Mondo:
Find here more studies on zinc and prevent a heart attack.

Minimaal 100 gram vis per week verlaagt de ziekte van Alzheimer

Research Question:
Lowers eating fish or long chain omega-3 fatty acids the chances of getting Alzheimer's disease?

Study Design:
This overview article contained prospective cohort studies.
There was a low heterogeneity between the studies and within the subgroups.                                                                                              

Results and conclusions:
The researchers found that both eating lots of long chain omega-3 fatty acids as fish the chance of getting dementia not significantly reduced [RR respectively = 0.97, 95% CI = 0.85-1.10 and RR = 0.84, 95% CI = 0.71-1.01].

The researchers found that eating a lot of long chain omega-3 fatty acids, the chances of getting Alzheimer's disease are not significantly by 11% [RR = 0.89, 95% CI = 0.74-1.08] reduced.
Not significant is, there cannot be said with 95% reliability that eating lots of long chain omega-3 fatty acids, the chances of getting Alzheimer's disease reduced.

The researchers found that eating a lot of fish, the chances of getting Alzheimer's disease significantly with 36% [RR = 0.64, 95% CI = 0.44-0.92] reduced.

The researchers found that eating 100 grams of fish per week, the chances of getting Alzheimer's disease significantly with 11% [RR = 0.89, 95% CI = 0.79-0.99] reduced.

The researchers concluded that eating a lot of fish (at least 100 grams per week) the chances of getting Alzheimer's disease (and not dementia) reduced.

Original title:
Omega-3 fatty acids intake and risks of dementia and Alzheimer's disease: A meta-analysis by Wu S, Thing Y, [...], Mao P.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25446949

Additional information about El Mondo:
Find here more studies eating fish.

Dagelijks 20 gram olijfolie verlaagt hart- en vaatziekten

Afbeelding

Onderzoeksvraag:
Epidemiologische studies hebben de preventieve effecten van het eten van olijfolie tegen cardiovasculaire gebeurtenissen en sterfte door alle oorzaken aangetoond, maar de resultaten blijven inconsistent. Daarom werd dit overzichtsartikel uitgevoerd.

Verlaagt het eten van veel olijfolie de kans op het krijgen van zowel hart- en vaatziekten als doodgaan aan alle oorzaken (all-cause mortaliteit)?

Studieopzet:
Dit overzichtsartikel bevatte 13 prospectieve cohort studies met een follow-up duur van 4 tot 28 jaar.

De cohort studies waren goed opgezet.
Er was geen publicatie bias.

Resultaten en conclusies:
De onderzoekers vonden in 8 cohort studies (261016 deelnemers, waarvan 14033 mensen met hart- en vaatziekte), vergeleken met een lage consumptie, dat een hoge consumptie van olijfolie de kans op het krijgen van hart- en vaatziekten significant met 15% [RR = 0.85, 95% BI = 0.77 tot 0.93, p 0.001, I2 = 41%, p = 0.107] verlaagde.
Dit significante verlaagde risico bleef gelijk in zowel de subgroepenanalyses als de sensitiviteitsanalyses.
Dit significante verlaagde risico nam niet meer toe boven 20 gram olijfolie per dag.

De onderzoekers vonden in 11 cohort studies (713000 deelnemers, waarvan 173817 doden), vergeleken met een lage consumptie, dat een hoge consumptie van olijfolie de kans op doodgaan aan alle oorzaken significant met 17% [RR = 0.83, 95% BI = 0.77 tot 0.90, p 0.001, I2 = 93%, p 0.001] verlaagde.
Dit significante verlaagde risico bleef gelijk in zowel de subgroepenanalyses als de sensitiviteitsanalyses.
Dit significante verlaagde risico nam niet meer toe boven 20 gram olijfolie per dag.

De onderzoekers vonden in dosisafhankelijke analyses dat elke verhoging met 5 gram olijfolie per dag, de kans op het krijgen van hart- en vaatziekten significant met 4% [RR = 0.96, 95% BI = 0.93 tot 0.99, p = 0.005] verlaagde.

De onderzoekers vonden in dosisafhankelijke analyses dat elke verhoging met 5 gram olijfolie per dag, de kans op doodgaan aan alle oorzaken significant met 4% [RR = 0.96, 95% BI = 0.95 tot 0.96, p 0.001] verlaagde.

De onderzoekers concludeerden dat het eten van 20 gram olijfolie per dag, de kans op het krijgen van zowel hart- en vaatziekten als doodgaan aan alle oorzaken verlaagde.

Oorspronkelijke titel:
Olive oil consumption and risk of cardiovascular disease and all-cause mortality: A meta-analysis of prospective cohort studies by Xia M, Zhong Y, [...], Qian C.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9623257/

Extra informatie van El Mondo:
Vind hier meer studies over olijfolie en hart- en vaatziekten.

Dagelijks 25-200 gram pinda’s verlagen mogelijk causaal triglyceridengehalte

Afbeelding

Onderzoeksvraag:
Hoewel talrijke studies het beschermende effect van het eten van noten op cardiovasculair risico hebben gemeld, is het bewijs voor de rol van pinda's bij het handhaven van de cardiometabole gezondheid niet overtuigend. Daarom werd dit overzichtsartikel uitgevoerd.

Verbetert een hoge consumptie van pinda’s causaal de risicofactoren van hart- en vaatziekten, zoals cholesterolgehalte en LDL/HDL verhouding?
Studieopzet:
Dit overzichtsartikel bevatte 10 RCT’s met in totaal 643 deelnemers in de leeftijd van 18 tot 84 jaar.
De hoeveelheid pinda’s varieerde tussen 25 en 200 gram per dag met een follow-up duur van 2 tot 24 weken.

De studies waren slecht opgezet.

Resultaten en conclusies:
De onderzoekers vonden dat het eten van pinda’s het triglyceridengehalte significant verlaagde [MD = -0.13, 95% BI = -0.20 tot -0.07, p 0.0001].

De onderzoekers vonden bij gezonde personen dat het eten van pinda’s het totale cholesterolgehalte significant verlaagde [MD = -0.40, 95% BI = -0.71 tot -0.09, p = 0.01].

De onderzoekers vonden bij gezonde personen dat het eten van pinda’s de LDL/HDL verhouding significant verlaagde [MD = -0.19, 95% BI = -0.36 tot -0.01, p = 0.03].

De onderzoekers vonden bij mensen met een hoog cardiometabolisch risico dat het eten van pinda’s tot een significante toename van het lichaamsgewicht leidde [MD = 0.97, 95% BI = 0.54 tot 1.41, p 0.0001].

De onderzoekers concludeerden dat het eten van 25 tot 200 gram pinda’s per dag gedurende 2 tot 24 weken, zowel het triglyceridengehalte als het totale cholesterolgehalte mogelijk causaal verlaagde. Mogelijk omdat de studies slecht opgezet waren.

Oorspronkelijke titel:
Effect of Peanut Consumption on Cardiovascular Risk Factors: A Randomized Clinical Trial and Meta-Analysis by Parilli-Moser I, Hurtado-Barroso S, […], Lamuela-Raventós RM.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9011914/

Extra informatie van El Mondo:
Vind hier meer studies over noten, cholesterol en hart- en vaatziekten.

Seleniumsupplementen verlagen depressie

Afbeelding

Onderzoeksvraag:
De resultaten van studies bij mensen met betrekking tot selenium en depressieve stoornissen zijn inconsistent en daarom werd dit overzichtsartikel uitgevoerd.

Verlaagt een hoge selenium inname (via voeding of voedingssuplementen) de kans op het krijgen van depressie?

Studieopzet:
Dit overzichtsartikel bevatte 20 studies (4 RCT’s, 9 cross-sectionele studies, 4 patiënt-controle studies en 3 prospectieve cohort studies) met in totaal 47164 deelnemers in de leeftijd van 18 tot 82 jaar.

Er was geen publicatie bias.
De RCT’s waren goed opgezet.

Resultaten en conclusies:
De onderzoekers vonden dat een hoge inname van seleniumsupplementen de kans op het krijgen van postnatale depressie significant met 3% [OR = 0.97, 95% BI = 0.95 tot 0.99, I2 = 0.0%, p = 0.507] verlaagde.

De onderzoekers vonden dat het slikken van seleniumsupplementen de kans op het krijgen van depressieve symptomen significant verlaagde [WMD = -0.37, 95% BI = -0.56 tot -0.18, I2 = 0.0%, p = 0.959].

De onderzoekers concludeerden dat een hoge inname van seleniumsupplementen de kans op het krijgen van postnatale depressie verlaagde. Verder, verlaagde het slikken van seleniumsupplementen de kans op het krijgen van depressieve symptomen.

Oorspronkelijke titel:
The role of selenium in depression: a systematic review and meta-analysis of human observational and interventional studies by Sajjadi SS, Foshati S, […], Rouhani H.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8776795/

Extra informatie van El Mondo:
Vind hier meer informatie/studies over selenium en depressie.

Tomaten verlagen causaal tumornecrosefactor-alfa gehalte bij volwassenen

Afbeelding

Onderzoeksvraag:
Ontsteking is een belangrijke oorzaak van chronische ziekten. Verschillende studies hebben de effecten van het eten van tomaten op de inflammatoire biomarkers (C-reactieve proteïne (CRP), interleukine 6 (IL-6) en tumornecrosefactor-α (TNF-α) onderzocht maar de resultaten zijn dubbelzinnig en daarom werd dit overzichtsartikel uitgevoerd.

Verlaagt het eten van tomaten causaal de kans op het krijgen van ontstekingen bij volwassenen?

Studieopzet:
Dit overzichtsartikel bevatte 7 RCT’s met in totaal 465 deelnemers.

Resultaten en conclusies:
De onderzoekers vonden dat het eten van tomaten het tumornecrosefactor-alfa gehalte (TNF-α gehalte) bij volwassenen significant verlaagde [Hedges' g = -0.45, 95% BI = -0.76 tot -0.13, p = 0.005, I2 = 0.0%].
Echter, het had geen effect op het CRP en IL-6 gehalte.

De onderzoekers concludeerden dat het eten van tomaten het tumornecrosefactor-alfa gehalte (TNF-α gehalte) bij volwassenen causaal verlaagde.

Oorspronkelijke titel:
Effect of tomato consumption on inflammatory markers in health and disease status: A systematic review and meta-analysis of clinical trials by Widjaja G, Doewes RI, […], Aravindhan S.

Link:
https://pubmed.ncbi.nlm.nih.gov/35871957/

Extra informatie van El Mondo:
Vind hier meer informatie/studies over tomaten en chronische ziekten.

Tumornecrosefactor-alfa (TNF-α) is een inflammatoir cytokine dat verhoogd is bij hartfalen.

Brassica-groenten verlagen causaal totaal cholesterolgehalte

Afbeelding

Onderzoeksvraag:
Eerdere onderzoeken naar het effect van de Brassica-groenten op het bloedglucosegehalte en het lipidenprofiel hebben geen overtuigende bevindingen opgeleverd. Daarom werd dit overzichtsartikel uitgevoerd.

Verbetert een hoge consumptie van Brassica-groenten causaal de risicofactoren van hart- en vaatziekten, zoals cholesterol-, nuchter bloedsuiker-, HbA1c en triglyceridengehalte?

Studieopzet:
Dit overzichtsartikel bevatte 9 RCT’s met in totaal 548 deelnemers.

Resultaten en conclusies:
De onderzoekers vonden in gepoolde analyses dat het eten van veel Brassica-groenten het totale cholesterolgehalte significant verlaagde [SMD = -0.28, 95% BI= -0.48 tot -0.08, p = 0.005].
Echter, het verlaagde niet het serum triglyceriden, LDL cholesterol, nuchter bloedsuiker en het HbA1c gehalte.

De onderzoekers concludeerden dat het eten van Brassica-groenten het totale cholesterolgehalte causaal verlaagde.

Oorspronkelijke titel:
The effect of Brassica vegetables on blood glucose levels and lipid profiles in adults. A systematic review and meta-analysis by Darand M, Alizadeh S and Mansourian M.

Link:
https://pubmed.ncbi.nlm.nih.gov/35412701/

Extra informatie van El Mondo:
Vind hier meer studies over groenteconsumptie, cholesterol, suikerziekte en hart- en vaatziekten.

Onder de familie “Brassica” vallen alle koolsoorten (bloemkool, broccoli, Chinese kool, witte kool), maar ook mosterd, raapzaad, paksoi en knolraap.


 

Groente en fruit verlagen baarmoederhalskanker

Afbeelding

Onderzoeksvraag:
Verlaagt het eten van groente of fruit de kans op het krijgen van endometriumkanker (baarmoederhalskanker)?
Studieopzet:
Dit overzichtsartikel bevatte 21 patiënt-controle studies en 6 cohort studies.

Resultaten en conclusies:
De onderzoekers vonden dat het eten van groente de kans op het krijgen van endometriumkanker significant met 24% [gepoolde odds ratio [OR], relatieve risico [RR], hazard ratio [HR] = 0.76, 95% BI = 0.63 tot 0.91] verlaagde.
Dit resultaat werd gevonden in studies van hoge kwaliteit.

De onderzoekers vonden dat het eten van kruisbloemige groente de kans op het krijgen van endometriumkanker significant met 19% [gepoolde OR = 0.81, 95% BI = 0.70 tot 0.94] verlaagde.
Dit resultaat werd gevonden in studies van hoge kwaliteit.

De onderzoekers vonden dat het eten van donkergroene en geel-oranje groente de kans op het krijgen van endometriumkanker significant met 36% [gepoolde OR = 0.64, 95% BI = 0.42 tot 0.97] verlaagde.

De onderzoekers vonden dat het eten van fruit de kans op het krijgen van endometriumkanker significant met 19% [gepoolde OR = 0.81, 95% BI = 0.70 tot 0.92] verlaagde.
Dit resultaat werd gevonden in studies van hoge kwaliteit.

De onderzoekers concludeerden dat het eten van zowel groente (met name kruisbloemige, donkergroene en geel-oranje groente) als fruit de kans op het krijgen van endometriumkanker (baarmoederhalskanker) verlaagde.

Oorspronkelijke titel:
The influence of dietary vegetables and fruits on endometrial cancer risk: a meta-analysis of observational studies by Lu YT, Gunathilake M and Kim J.

Link:
https://pubmed.ncbi.nlm.nih.gov/36151331/

Extra informatie van El Mondo:
Vind hier meer informatie/studies over patiënt-controle en cohort studies, kanker en groenten en fruit consumptie.

 

Vitamine E supplementen verlagen ziekte van Alzheimer

Afbeelding

Onderzoeksvraag:
Dementie is een chronische progressieve neurodegeneratieve ziekte die kan leiden tot invaliditeit en het overlijden bij mensen, maar er is nog steeds geen effectieve preventie en behandeling voorhanden. Vanwege de neuroprotectieve effecten van vitamine E heeft een groot aantal onderzoekers onderzocht of vitamine E het risico op dementie kan verminderen. Sommige onderzoekers zijn van mening dat vitamine E het risico op dementie kan verminderen, terwijl anderen tegenovergestelde conclusie trekken en daarom werd dit overzichtsartikel uitgevoerd.

Verlaagt een hoge vitamine E inname (via voeding of voedingssupplementen) de kans op het krijgen van dementie en de ziekte van Alzheimer?

Studieopzet:
Dit overzichtsartikel bevatte 13 cohort studies met 46968 deelnemers, waarvan 6046 mensen met dementie na een follow-up duur van 4 tot 23 jaar en 2 patiënt-controle studies met 3157 controles en 3459 mensen met dementie (=de patiënten).

De NOS waarde varieerde tussen 6 en 8 (het betekent dat de studies goed opgezet waren).
Er was geen publicatie bias.

Resultaten en conclusies:
De onderzoekers vonden in gepoolde analyses dat een hoge vitamine E inname (via voeding en/of voedingssupplementen) de kans op het krijgen van dementie significant met 21% [OR = 0.79, 95% BI = 0.70 tot 0.88, I2 = 35.0%] verlaagde.
Dit significante verlaagde risico werd ook teruggevonden in cohort studies [OR = 0.79, 95% BI = 0.69 tot 0.89] en in studies met een NOS waarde boven 7 [OR = 0.85, 95% BI = 0.75 tot 0.97].

De onderzoekers vonden in de subgroepanalyses dat een hoge vitamine E inname via voeding de kans op het krijgen van dementie significant met 22% [OR = 0.78, 95% BI = 0.65 tot 0.95] verlaagde.

De onderzoekers vonden in de subgroepanalyses dat een hoge vitamine E inname via voedingssupplementen de kans op het krijgen van dementie significant met 17% [OR = 0.83, 95% BI = 0.73 tot 0.94] verlaagde.

De onderzoekers vonden dat een hoge vitamine E inname (via voeding en/of voedingssupplementen) de kans op het krijgen van de ziekte van Alzheimer significant met 22% [OR = 0.78, 95% BI = 0.64 tot 0.94, I2 = 36.9%] verlaagde.

Dit significante verlaagde risico werd ook teruggevonden in cohort studies [OR = 0.77, 95% BI = 0.63 tot 0.94].

De onderzoekers vonden in de subgroepanalyses dat een hoge vitamine E inname via voeding de kans op het krijgen van de ziekte van Alzheimer niet significant met 17% [OR = 0.83, 95% BI = 0.64 tot 1.09] verlaagde.

De onderzoekers vonden in de subgroepanalyses dat een hoge vitamine E inname via voedingssupplementen de kans op het krijgen van de ziekte van Alzheimer significant met 33% [OR = 0.67, 95% BI = 0.47 tot 0.96] verlaagde.

De onderzoekers vonden dat de resultaten die gevonden waren in gepoolde analyses gelijk bleven in de sensitiviteitsanalyses.

De onderzoekers concludeerden dat een hoge vitamine E inname zowel via voeding als voedingssupplementen de kans op het krijgen van dementie verlaagde. Verder, verlaagde alleen een hoge vitamine E inname via voedingssupplementen de kans op het krijgen van de ziekte van Alzheimer.

Oorspronkelijke titel:
Association of vitamin E intake in diet and supplements with risk of dementia: A meta-analysis by Zhao R, Han X, [...], You H.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9376618/

Extra informatie van El Mondo:
Vind hier meer studies over vitamine E en dementie
 

Hoog alfa-linoleenzuur bloedgehalte verlaagt dikke darmkanker

Onderzoeksvraag:
Verlaagt een hoog alfa-linoleenzuur bloedgehalte of een hoge alfa-linoleenzuur inname via voeding de kans op het krijgen van dikke darmkanker?

Studieopzet:
Dit overzichtsartikel bevatte 15 cohort studies met 12239 mensen met dikke darmkanker onder 861725 deelnemers.
De gemiddelde follow-up duur was 9.3 jaar.
Er was geen publicatie bias.
13 van de 15 studies hadden een NOS waarde van 8. Anders gezegd, 13 studies waren goed opgezet.

Resultaten en conclusies:
De onderzoekers vonden dat een hoog alfa-linoleenzuur bloedgehalte, de kans op het krijgen van dikke darmkanker significant met 17% [gepoolde RR = 0.83, 95% BI = 0.69 tot 0.99, I2 = 0%] verlaagde.

De onderzoekers vonden dat elke verhoging van het alfa-linoleenzuur bloedgehalte met 0.1%, de kans op het krijgen van dikke darmkanker significant met 10% [gepoolde RR = 0.90, 95% BI = 0.80 tot 0.99, I2 = 38.6%] verlaagde.

De onderzoekers concludeerden dat een hoog alfa-linoleenzuur bloedgehalte, de kans op het krijgen van dikke darmkanker verlaagde.

Oorspronkelijke titel:
Association of Dietary Intake and Biomarker of α-Linolenic Acid With Incident Colorectal Cancer: A Dose-Response Meta-Analysis of Prospective Cohort Studies by Dai ZB, Ren XL, […], Xu L.

Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9301188/

Extra informatie van El Mondo:
Vind hier meer informatie/studies over patiënt-controle en cohort studies, alfa-linoleenzuur en dikke darmkanker.

Vind hier welke producten veel alfa-linoleenzuur bevatten.

Een hoog alfa-linoleenzuur bloedgehalte kan verkregen worden door producten te eten die veel alfa-linoleenzuur bevatten en/of alfa-linoleenzuur supplementen te slikken.