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Depression: 21st Century Solutions + The Dark Side of Wheat

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Abstract Title:

Effect of nut consumption on vascular endothelial function: A systematic review and meta-analysis of randomized controlled trials.

Abstract Source:

Clin Nutr. 2017 Apr 20. Epub 2017 Apr 20. PMID: 28457654

Abstract Author(s):

Yunjun Xiao, Wei Huang, Chaoqiong Peng, Jinzhou Zhang, Carmen Wong, Jean H Kim, Eng-Kiong Yeoh, Xuefen Su

Article Affiliation:

Yunjun Xiao

Abstract:

OBJECTIVE: nut consumption has consistently been found to be associated with a reduced risk of cardiovascular diseases (CVD) and mortality in prospective studies. However, its effect on endothelial function, a prognostic marker of CVD, is still controversial in clinical trials. This meta-analysis of randomized controlled trials (RCTs) aimed to quantitatively assess the effect of nuts on vascular endothelial function.

METHODS: Major electronic databases were searched for published RCTs that reported the effect of nuts on flow mediated dilation (FMD) as a measurement of endothelial function in the adult population (age eighteen years or over). We calculated the pooled estimates of weighted mean differences (WMDs) and their 95% confidence intervals (CIs) by using random-effects models.

RESULTS: A total of nine papers (10 trials) involving 374 participants were included. The pooled estimates found that nut consumption significantly improved FMD (WMD: 0.41%; 95% CI: 0.18%, 0.63%; P = 0.001). Moderate and marginally significant heterogeneity was observed among the studies (I(2) = 39.5%, P = 0.094). Subgroup analyses indicated that walnuts significantly improved FMD (WMD: 0.39%; 95% CI: 0.16%, 0.63%; P = 0.001). In addition, nut consumption had a significant effect on FMD in the trials with study duration<18 weeks, nut dose<67 g/d, or subjects with baseline FMD ≥8.6%.

CONCLUSIONS: Nut consumption significantly improved endothelial function. However, the beneficial effect was limited to walnuts. More studies examining the effect of other nuts on endothelial function are needed in the future.

Study Type : Meta Analysis, Review

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Sayer Ji
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Depression: 21st Century Solutions + The Dark Side of Wheat

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