Curcumin Preparations Can Improve Flow-Mediated Dilation and Endothelial Function: A Meta-Analysis

Area of Science:

• Cardiovascular Research
• Nutraceutical Science
• Medical Research

Background:

• Endothelial dysfunction is an early indicator of atherosclerosis.
• Flow-mediated dilation (FMD) assessed via ultrasonography is a key measure of endothelial function.
• Curcumin, derived from turmeric, is investigated for its potential to improve FMD and mitigate endothelial dysfunction.

Purpose of the Study:

• To systematically review and meta-analyze the impact of curcumin preparations on endothelial function, specifically FMD.
• To quantify the effect size of curcumin supplementation on FMD.

Main Methods:

• A meta-analysis of five randomized clinical trials was conducted.
• The primary outcome measured was the improvement in brachial artery FMD post-curcumin supplementation compared to control groups.
• Standardized mean difference and Hedges' g were used to calculate effect size, with publication bias also assessed.

Main Results:

• Curcumin preparations demonstrated a large, positive overall effect size (ES=1.379, Hedges' g=1.353) on FMD.
• The improvement in FMD was significantly greater in non-smokers (ES=1.639) compared to smokers (ES=0.379).

Conclusions:

• This meta-analysis confirms that curcumin preparations significantly enhance FMD compared to placebo, thereby improving endothelial function.
• The beneficial effects of curcumin on FMD appear to be less pronounced in individuals who smoke.