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Crit Rev Food Sci Nutr. 2018 Oct 29:1-10. doi: 10.1080/10408398.2018.1517724. [Epub ahead of print]

The effects of curcumin supplementation on body weight, body mass index and waist circumference: a systematic review and dose-response meta-analysis of randomized controlled trials.

Author information

1
a Department of Community Nutrition, School of Nutritional Sciences and Dietetics , Tehran University of Medical Sciences , Tehran , Iran.
2
b Students' Scientific Research Center (SSRC) , Tehran University of Medical Sciences (TUMS) , Tehran , Iran.
3
c Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular -Cellular Sciences Institute, Tehran University of Medical Sciences , Tehran , Iran.
4
d Food Security Research Center, Department of Community Nutrition, School of Nutrition and Food Science , Isfahan University of Medical Sciences , Isfahan , Iran.

Abstract

BACKGROUND & OBJECTIVES:

Inconsistent data are available about the effect of curcumin supplementation on body weight. This systematic review and meta-analysis was done to summarize data from available clinical trials on the effect of curcumin supplementation on body weight, Body Mass Index (BMI), and Waist Circumference (WC).

METHODS:

PubMed, SCOPUS, Cochrane Library and Google Scholar were searched to find relevant articles up to August 2018. The effect sizes were expressed as weighted mean difference (WMD) and 95% confidence intervals (CI). Between-study heterogeneity was assessed using I2. Subgroup analysis was done to find possible sources of heterogeneity.

RESULTS:

Totally, 11 studies that enrolled 876 subjects (53% women) were included. Combining effect sizes suggested a significant effect of curcumin administration on body weight (Weighed Mean Difference (WMD): -1.14 kg, 95% CI: -2.16, -0.12, P = 0.02) and BMI (WMD: -0.48 kg/m2, 95% CI: -0.78, -0.17, P = 0.002), respectively. However, no significant effect of curcumin supplementation on WC was found (WMD: -1.51 cm, 95% CI: -4.041, 1.003, P = 0.23). Based on subgroup analysis, we found that the effect of curcumin on WC was significant in studies that prescribed ≥1000 mg/d curcumin (P ≤ 0.001), those with the intervention duration of ≥8 weeks (P ≤ 0.001), and those that was performed on overweight subjects (P ≤ 0.001).

CONCLUSIONS:

We found a significant effect of curcumin supplementation on body weight and BMI, but not on WC. However, the effect of curcumin on WC was significant in studies done on overweight subjects, used ≥1000 mg/d curcumin, and ≥8 weeks of duration.

KEYWORDS:

BMI; Curcumin; body weight; meta-analysis; obesity; waist circumference

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