Flavanols are potential anti-obesity agents, a systematic review and meta-analysis of controlled clinical trials

Nutrition, Metabolism, and Cardiovascular Diseases : NMCD
Masoumeh AkhlaghiFatemeh Mohammadian

Abstract

The anti-obesity potential of flavonoids has been shown by animal and human studies. In this meta-analysis, we systematically reviewed controlled clinical trials and quantified the effects of flavonoids and flavonoid subclasses on obesity-related anthropometric measures. PubMed, EMBASE, Scopus, Web of Science, and ProQuest databases were searched to identify trials examining the effect of flavonoids on body mass index (BMI), waist circumference, and body fat percentage. Fifty eight trials passed the eligibility process. Analysis endpoints were calculated as the mean difference between baseline and post-treatment. Flavonoids were in subclasses of flavanols, flavonols, isoflavones, flavanones, anthocyanins, and proanthocyanidins. They were mostly in the form of supplements and dosages varying from 40 to 1300 mg/day. Among flavonoid subclasses, flavanols showed potential for decreasing BMI, in the overall population (mean difference (MD) = -0.28 kg/m2, P = 0.04; n = 21) and in the subgroups of Asians (MD = -0.42 kg/m2; P = 0.046; n = 13), ages < 50 years (MD = -0.50 kg/m2; P = 0.008; n = 14), BMI ≥ 25 kg/m2 (MD = -0.30 kg/m2; P = 0.049; n = 15), and at doses ≥ 500 mg/day (MD = -0.36 kg/m2; P = 0.049; n = 12). Isoflavones also decr...Continue Reading

Citations

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