Mixed
Green coffee bean extract (GCA) containing high chlorogenic acid significantly reduces body weight, BMI, and percent body fat in overweight adults without requiring changes to diet or exercise.
If you are overweight, taking green coffee bean extract (specifically high-chlorogenic acid extracts like GCA) may help you lose weight and reduce body fat, even if you don't change your diet or exercise habits. The study used doses between 700mg and 1050mg per day. However, note that this specific study has been retracted, so verify current scientific consensus before starting.
Significant reductions were observed in body weight (−8.04 ± 2.31 kg), body mass index (−2.92 ± 0.85 kg/m2), and percent body fat (−4.44% ± 2.00%)... Importantly, the decreases occurred when subjects were taking GCA... with no significant changes to diet over the course of the study.
Why this rating
Small sample size (n=16), short duration (22 weeks), and the paper is marked as RETRACTED, though the extraction reflects the text provided.
Source
Randomized, double-blind, placebo-controlled, linear dose, crossover study to evaluate the efficacy and safety of a green coffee bean extract in overweight subjects
Joe A. Vinson et al. · Diabetes Metabolic Syndrome and Obesity · 2012
DOI 10.2147/dmso.s27665
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