Voeding en gezondheid

Borstvoeding verlaagt baarmoederkanker

Onderzoeksvraag:
Verlaagt het geven van borstvoeding de kans op het krijgen van baarmoederkanker?

Studieopzet:
Dit overzichtsartikel bevatte 3 prospectieve cohort studies en 11 patiënt-controle studies.

Resultaten en conclusies:
De onderzoekers vonden dat het geven van borstvoeding vergeleken met het niet geven van borstvoeding, de kans op het krijgen van baarmoederkanker niet significant met 9% [95% BI = 0.75-1.09] verlaagde.

De onderzoekers vonden voor de langste borstvoedingduur vergeleken met de korste, een signficant verlaagde risico van 24% [95% BI = 0.59-0.98] op het krijgen van baarmoederkanker.

De onderzoekers vonden voor elke 6 maanden borstvoeding een signficant verlaagde risico van 7% [RR = 0.93, 95% BI = 0.88-0.97] op het krijgen van baarmoederkanker.

De onderzoekers concludeerden dat het geven van borstvoeding – hoe langer, hoe beter –  de kans op het krijgen van baarmoederkanker verlaagde.

Oorspronkelijke titel:
Association between breastfeeding and risk of endometrial cancer: a meta-analysis of epidemiological studies by Ma X, Zhao LG, [...], Xiang YB.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/26258808   


Extra informatie van El Mondo:
Vind hier meer studies over zwangerschap.

Internationaal wordt aanbevolen borstvoeding tot het tweede levensjaar te geven waarvan de eerste 6 maanden uitsluitend borstvoeding. Na die 6 maanden wordt borstvoeding aangevuld met vaste voeding. 

Dagelijks 250-400 gram druiven verlaagt de bloeddruk

Onderzoeksvraag:
Het effect van druivenpolyfenolen op de bloeddruk blijft onduidelijk. Daarom werd dit overzichtsartikel uitgevoerd.

Verlaagt de inname van druivenpolyfenolen de bloeddruk?

Studieopzet:
Dit overzichtsartikel bevatte 10 studies.
Er was geen heterogeniteit en publicatie bias.

Resultaten en conclusies:
De onderzoekers vonden dat een dagelijkse inname van druivenpolyfenolen de systolische bloeddruk significant met 1.48 mmHg [95% BI = -2.79 tot -0.16 mmHg, p = 0.03] verlaagde.

De onderzoekers vonden dat een vermindering van de systolische bloeddruk het grootste was bij een dagelijkse inname van druivenpolyfenolen tot 733 mg en bij mensen met een metabool syndroom.

De onderzoekers vonden dat een dagelijkse inname van druivenpolyfenolen de diastolische bloeddruk niet significant verlaagde.

De onderzoekers concludeerden dat het eten van druivenpolyfenolen tot 733 mg per dag de systolische bloeddruk, met name bij mensen met een metabool syndroom verlaagde.

Oorspronkelijke titel:
Effect of Grape Polyphenols on Blood Pressure: A Meta-Analysis of Randomized Controlled Trials by Li SH, Zhao P, […], Cui LQ.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/26375022

Extra informatie van El Mondo:
Vind hier meer studies over het eten van fruit en bloeddruk.
100 gram druiven levert 200-300 mg polyfenolen.

Dagelijks 4.5 microgram vitamine B12 via voeding verlaagt dikke darmkanker

Onderzoeksvraag:
Verlaagt vitamine B12 de kans op het krijgen van dikke darmkanker?

Studieopzet:
Dit overzichtsartikel bevatten 17 studies met in totaal 10601 mensen met dikke darmkanker.

Resultaten en conclusies:
De onderzoekers vonden dat elke verhoging met 4.5 microgram vitamine B12 per dag via voeding, de kans op het krijgen van dikke darmkanker significant met 8.6% [RR = 0.914, 95% BI = 0.856-0.977] verlaagde.

De onderzoekers vonden dat elke verhoging met 4.5 microgram vitamine B12 per dag zowel via voeding als supplementen, de kans op het krijgen van dikke darmkanker significant met 3.7% [RR = 0.963, 95% BI = 0.928- 0.999] verlaagde.

De onderzoekers vonden dat elke verhoging van de vitamine B12-bloedwaarde met 150 picomol/L, de kans op het krijgen van dikke darmkanker niet significant met 2.3% [RR = 1.023, 95% BI 0.881-1.187] verhoogde.

De onderzoekers vonden dat het non-lineaire dosisafhankelijke verband tussen vitamine B12-bloedwaarde en het krijgen van dikke darmkanker niet signifant [p=0.219] was.

De onderzoekers concludeerden dat elke verhoging met 4.5 microgram vitamine B12 per dag, de kans op het krijgen van dikke darmkanker verlaagde.

Oorspronkelijke titel:
A dose-response meta-analysis reveals an association between vitamin B12 and colorectal cancer risk by Sun NH, Huang XZ, [...], Wang ZN.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/26373257

Extra informatie van El Mondo:
Vind hier meer studies over het beschermdende effect van vitamine B12 tegen dikke darmkanker.

Deze maaltijd levert minimaal 4.5 microgram vitamine B12 per dag.

Veel vitamine C via voeding verlaagt alvleesklierkanker

Onderzoeksvraag:
Verlaagt het eten van vitamine C de kans op het krijgen van alvleesklierkanker?  

Studieopzet:
Dit overzichtsartikel bevatten 17 studies (13 patiënt-controle en 4 cohort studies) met 4827 mensen met alvleesklierkanker.

De p-waarde van de Egger’s test was 0.414.

Resultaten en conclusies:
De onderzoekers vonden dat het eten van veel vitamine C vergeleken met weinig, de kans op het krijgen van alvleesklierkanker significant met 29.5% [gepoolde RR = 0.705, 95% BI = 0.612-0.811, I2 = 42.3%] verlaagde.

De onderzoekers vonden in patënt-controle studies dat het eten van veel vitamine C vergeleken met weinig, de kans op het krijgen van alvleesklierkanker significant met 25.2% [gepoolde RR = 0.648, 95% BI = 0.553-0.760] verlaagde.

De onderzoekers vonden in cohort studies dat het eten van veel vitamine C vergeleken met weinig, de kans op het krijgen van alvleesklierkanker significant met 17.3% [gepoolde RR = 0.827, 95% BI = 0.651-0.994] verlaagde.

De onderzoekers vonden dat het eten van veel vitamine C vergeleken met weinig, de kans op het krijgen van alvleesklierkanker zowel onder blanken, aziaten en gemengde populatie significant verlaagde. 

De onderzoekers concludeerden dat het eten van veel vitamine C de kans op het krijgen van alvleesklierkanker verlaagde.

Oorspronkelijke titel:
Association between vitamin C intake and the risk of pancreatic cancer: a meta-analysis of observational studies by Fan H, Kou J, […], Hea Q.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4566085/

Extra informatie van El Mondo:
Vind hier meer studies over het beschermdende effect van vitamine C tegen kanker.

Lees hier meer over overzichtsartikel, patiënt-controle studies en Egger’s test.

Een voeding met veel vitamine C is een voeding met minimaal 100 mg vitamine C. Deze maaltijden bevatten minimaal 100 mg vitamine C.

 

Dagelijks 800 gram groenten en fruit verlaagt hart- en vaatziekten

Onderzoeksvraag:
Verlaagt het eten van groenten en fruit de kans op het krijgen van hart- en vaatziekten?

Studieopzet:
Dit overzichtsartikel bevatte 47 prospectieve cohort studies met in totaal 1498909 deelnemers, waarvan 44013 deelnemers met hart- en vaatziekten. Het gemiddelde follow-up duur was 10.5 jaar.

Resultaten en conclusies:
De onderzoekers vonden dat het eten van veel groenten en fruit de kans op het krijgen van hart- en vaatziekten significant met 17% [RR = 0.83, 95% BI = 0.79-0.86] verlaagde.

De onderzoekers vonden dat het eten van veel fruit de kans op het krijgen van hart- en vaatziekten significant met 16% [RR = 0.84, 95% BI = 0.79-0.88] verlaagde.

De onderzoekers vonden dat het eten van veel groenten de kans op het krijgen van hart- en vaatziekten significant met 13% [RR = 0.87, 95% BI = 0.83-0.91] verlaagde.

De onderzoekers vonden in een dosisafhankelijke analyse dat het eten van 800 gram groenten en fruit per dag, de kans op het krijgen van hart- en vaatziekten het meest verlaagde.

De onderzoekers concludeerden dat het dagelijks eten van veel groenten en/of fruit (het liefst 800 gram groenten en fruit per dag), de kans op het krijgen van hart- en vaatziekten verlaagde.

Oorspronkelijke titel:
Fruit and Vegetable Consumption and Risk of Cardiovascular Disease: a Meta-analysis of Prospective Cohort Studies by Zhan J, Liu YJ, […], He QQ.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/26114864

Extra informatie van El Mondo:
Vind hier meer studies over het eten van groenten en fruit en hart- en vaatziekten.

 

n-3 PUFA via voeding verlaagt niet dikke darmkanker

Onderzoeksvraag:
Epidemiologische studies naar de relatie tussen de inname van n-3 PUFA en het risico op het krijgen van dikke darmkanker lieten inconsistente resultaten zien. Daarom werd dit overzichtsartikel uitgevoerd.

Verlaagt het eten van n-3 PUFA de kans op het krijgen van dikke darmkanker?

Studieopzet:
Dit overzichtsartikel bevatte 14 prospectieve cohort studies met 8775 mensen met dikke darmkanker.

Resultaten en conclusies:
De onderzoekers vonden geen relatie tussen de inname van de totale n-3 PUFA of mariene n-3 PUFA en het risico op het krijgen van dikke darmkanker.

De onderzoekers vonden dat de inname van mariene n-3 PUFA lang voor de diagnose, de kans op het krijgen van dikke darmkanker significant met 21% [RR = 0.79, 95% BI = 0.63-1.00] verlaagde.

De onderzoekers concludeerden dat het eten van n-3 PUFA de kans op het krijgen van dikke darmkanker niet verlaagde.

Oorspronkelijke titel:
N-3 polyunsaturated fatty acids intake and risk of colorectal cancer: meta-analysis of prospective studies by Chen GC, Qin LQ, [...], Wang XH.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25416450

Extra informatie van El Mondo:
Vind hier meer studies over dikke darmkanker en n-3 PUFA. Mariene n-3 PUFA zit in algen en vis. In vette vissen zitten meer n-3 PUFA dan in niet vette vissen.

Beta glucanen gedurende 6 weken verlagen de bloeddruk

Onderzoeksvraag:
Verlaagt vezelconsumptie de bloeddruk?

Studieopzet:
Dit overzichtsartikel bevatte 18 RCT’s van minstens 6 weken.

Resultaten en conclusies:
De onderzoekers vonden dat een hoge vezelinname de systolische bloeddruk significant met 0.9 mmHg [95% BI = -2.5 tot 0.6  mmHg] verlaagde. Het verschil tussen de hoogste en laagste vezelcatergorie was 6 gram.

De onderzoekers vonden dat een hoge vezelinname de diastolische bloeddruk significant met 0.7 mmHg [95% BI = -1.9 tot 0.5  mmHg] verlaagde. Het verschil tussen de hoogste en laagste vezelcatergorie was 6 gram.  

De onderzoekers vonden dat een dieet met veel beta glucanen de systolische bloeddruk significant met 2.9 mmHg [95% BI = 0.9 tot 4.9 mmHg] verlaagde. Het verschil tussen de hoogste en laagste beta-glucaancatergorie was 4 gram.

De onderzoekers vonden dat een dieet met veel beta-glucanen de diastolische bloeddruk significant met1.5 mmHg [95% BI = 0.2 tot 2.7  mmHg] verlaagde.

De onderzoekers concludeerden dat een hoge vezelinname, met name beta glucanen de bloeddruk verlaagde.

Oorspronkelijke titel:
Effects of dietary fibre type on blood pressure: a systematic review and meta-analysis of randomized controlled trials of healthy individuals by Evans CE, Greenwood DC, […], Burley VJ.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25668347

Extra informatie van El Mondo:
Vind hier meer studies over het verlagen van de bloeddruk en de vezelconsumptie.
Beta glucanen zitten in haver en gerst. 5 eetlepels haverzemelen leveren 3 gram beta glucanen.

100 g volkoren haver bevat 3.5 g beta glucanen.

De EFSA heeft de volgende gezondheidsclaim van beta glucanen goedgekeurd. Een dagelijkse inname van tenminste 3 gram gerst beta-glucanen verlaagt het cholesterolgehalte. Een goedgekeurde gezondheidsclaim van de EFSA wil zeggen dat de EFSA het wetenschappelijk bewezen acht, dat tenminstens 3 gram beta-glucanen per dag het cholesterolgehale verlaagt.

De fabrikant mag de goedgekeurde gezondheidsclaim van de EFSA op de verpakking van een levensmiddel of voedingssupplement zetten. De goedgekeurde gezondheidsclaim van de EFSA wordt gebruikt om de verkoop van het product te verhogen.

Een vezelrijk dieet is een dieet met minimaal 1.5 gram vezels per 100 kcal. Welke producten uit de supermarkt 1.5 gram vezels per 100 kcal bevatten, kunt u hier opzoeken.

Dagelijks 7 mg vitamine E via voeding verlaagt leeftijdsgebonden staar

Research Question:
Increases the ingest of vitamin E through feeding the chance of getting age-related cataracts?

Study Design:
This overview article contained studies with participants in all age groups. 

Results and conclusions:
The researchers found that eating a lot of vitamin E the chance of getting age-related cataracts significantly with 27% [RR = 0.73, 95% CI = 0.58-0.92] reduced.

The researchers found that the combination food and swallowing vitamin E the chance of getting age-related cataracts significantly with 14% [RR = 0.86, 95% CI = 0.75-0.99] reduced.

The researchers found that a high vitamin E content in the body the chance of getting age-related cataracts significantly with 23% [RR = 0.77, 95% CI = 0.66-0.91] reduced.

The researchers found that taking vitamin E the chance of getting age-related cataracts are not significantly with 8% [RR = 0.92, 95% CI = 0.78-1.07] reduced. Not significant is, there is no link to a 95% reliability.

The researchers found a non-linear relationship between eating vitamin E and the chance of getting age-related cataracts.

The researchers found that eating 7 mg of vitamin E per day the chances of getting age-related cataracts significantly with 6% [RR = 0.94, 95% CI = 0.90-0.97] reduced.

On the basis of the found results the researchers concluded that eating and not swallowing vitamin E reduced the chance of getting age-related cataracts.

Original title:
Vitamin E and risk of age-related cataract: a meta-analysis by Zhang Y, Jiang W, [...], Zhang D.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25591715

Additional information about El Mondo:
Find here more studies on age-related cataracts and vitamin E.
This meal provides 7 mg vitamin e.

100 mg cholesterol per dag verhoogt alvleesklierkanker

Research Question:
Eating cholesterol increases the chance of getting pancreatic cancer?

Study Design:
This overview article contained 16 articles with 4513 pancreatic cancer patients.

Results and conclusions:
The researchers found that a high cholesterol intake significantly with the chance of getting alveesklierkanker 37.1% [RR = 1,383, 95% CI = 1.155-1,627, I2 = 58.2%] increased. 

The researchers found that a high cholesterol intake the chance of getting alveesklierkanker among Americans significantly with 30.2% [RR = 1.302, 95% CI = 1,175-1,568] increased. 

The researchers found that every 100 mg cholesterol per day, the chance of getting alveesklierkanker significantly with 8% [RR = 1.08, 95% CI = 1.04-1.13] increased. 

The researchers concluded that 100 mg of cholesterol per day, the chance of getting pancreatic cancer, particularly among Americans increased.

Original title:
Association between cholesterol intake and pancreatic cancer risk: Evidence from a meta-analysis by Chen H, Qin S, [...], Zhang S.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25649888

Additional information about El Mondo:
Find here more studies on cholesterol and cancer.

Dagelijks 10 mg ijzer via voeding verhoogt de ziekte van Parkinson onder Europeanen

Research Question:
The ingest of iron through feeding increases the chance of getting Parkinson's disease?

Study Design:
This overview article contained 5 studies with 126507 participants.  

Results and conclusions:
The researchers found that a moderate iron intake through feeding the chance of getting Parkinson's disease not significant with 8% [RR = 1.08, 95% CI = 0.61-1.93, p = 0.787] increased.

The researchers found that a high iron intake through feeding the chance of getting Parkinson's disease not significant with 3% [RR = 1.03, 95% CI = 0.83-1.30, p = 0.309] increased.

The researchers found that a high iron intake through feeding the chance of getting Parkinson's disease among Europeans significantly with 47% [RR = 1.47, 95% CI = 1.17-1.85, p = 0.001] increased.

The researchers found that a high iron intake through feeding the chance of getting Parkinson's disease among men significantly with 43% [RR = 1.43, 95% CI = 1.01-2.01, p = 0.041] increased.

The researchers found that both a moderate as a high zinc-and copper intake through feeding the chance of getting Parkinson's disease not significantly increased.

The researchers found that daily 10 mg of iron through feeding the chance of getting Parkinson's disease among Europeans significantly with 18% [RR = 1.18, 95% CI = 1.02-1.37] increased.
Significant because RR of 1 was not in 95% CI from 1.02 to 1.37. RR of 1 is, there is no risk.

On the basis of the found results the researchers concluded that daily 10 mg of iron through feeding the chance of getting Parkinson's disease among Europeans increased.

Original title:
Dietary intake of iron, zinc, copper, and risk of Parkinson's disease: a meta-analysis by Cheng P, Yu J, [...], Xie P.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/26265293

Additional information about El Mondo:
Find here more studies on Parkinson's disease and iron.

Foliumzuur tijdens de zwangerschap verlaagt mogelijk aangeboren hartafwijkingen

Research Question:
Epidemiological studies showed contradictory results with regard to the relationship between the folate content of the mother and the risk of congenital heart defects. It was therefore carried out this review article.

Swallowing folic acid during pregnancy reduces the risk of congenital heart defects?

Study Design:
This overview article contained 1 RCT, 1 cohort and case-control studies with in total 18500 16 cases with congenital heart defects.

There was no question of publication bias.

Results and conclusions:
The researchers found that taking folic acid during pregnancy the risk of congenital heart defects significantly with 22% [RR = 0.78, 95% CI = 0.69-0.89, I2 = 31.9%] reduced.

The researchers concluded that the swallowing folic acid during pregnancy the risk of congenital heart disease may be reduced. Possible because this overview article contained only case-control studies.

Original title:
Maternal folic acid supplementation and the risk of congenital heart defects in offspring: a meta-analysis of epidemiological observational studies by Feng Y, Wang S, [...], Mo X.

Link:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4330542/

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

 

Carotenoïden via voeding verlagen mogelijk hoofd- en nekkanker

Research Question:
Lowers eating carotenoids the chance of getting head and neck cancer?   

Study Design:
This overview article contain 14 case-control studies and 1 prospective cohort studies.

Results and conclusions:
The researchers found that the ingest of many beta-carotene equivalents through feeding the chance of getting oral cancer significantly with 46% [OR = 0.54, 95% = 0.37-0.80] and the chance of getting Larynx Cancer significantly with 57% [OR = 0.43, 95% = 0.24-0.77] reduced.

The reduced risk was also found for eating lycopene, Alpha-carotene and beta-cryptoxanthin.

The researchers concluded that eating a lot of carotenoids the chance of getting head and neck cancer may be reduced. Possible because the overview article only case-control studies and only 1 cohort study.

Original title:
Carotenoid Intake from Natural Sources and Head and Neck Cancer: A Systematic Review and Meta-analysis of Epidemiological Studies by Leoncini E, N D, [...], Boccia S.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25873578

Additional information about El Mondo:
Find here more studies on the beschermdende effect of carotenoids against 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.

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.