Supplementation of green coffee bean extract in healthy overweight subjects increases lean mass/fat mass ratio: A randomized, double-blind clinical study

SAGE Open Med. 2021 Mar 19:9:20503121211002590. doi: 10.1177/20503121211002590. eCollection 2021.


Objective: In this study, we have demonstrated that supplementation of a complex of chlorogenic acid isomers (CGA-7TM) could significantly mitigate the risk of obesity in healthy overweight subjects.

Method: In a double-blind, placebo-controlled clinical study, healthy overweight (body mass index ⩾ 25 to <30 kg/m2) male and female subjects (N = 71) were randomly allocated to receive 500 mg CGA-7 or placebo daily for 12 weeks. Changes in body weight and body mass index were recorded alongside vital signs and anthropometric measurements at week 4, 8 and 12. Body composition was assessed at baseline and the end of treatment using dual-energy X-ray absorptiometry. Safety analysis included serum biochemical and haematological assessments and measurement of vital signs. In addition, any adverse or serious adverse events were recorded during the study.

Results: Sixty subjects completed the study. Mean body weight and body mass index were significantly reduced in CGA-7 group as compared to placebo (p < 0.001). CGA-7 group showed significant changes in body fat (%), fat mass and lean mass in comparison with placebo group (1.38% ± 1.4% vs -0.22% ± 0.86%, 1.97 ± 1.44 kg vs -0.39 ± 1.31 kg; 0.81 ± 1.20 kg vs -0.13 ± 0.97 kg, p < 0.001). Consumption of CGA-7 significantly improved the serum lipid profile. Importantly, CGA-7 consumption in humans had no adverse effects and was well tolerated during the study. The blood biochemical and haematological parameters marginally varied in the treatment groups throughout the study.

Conclusion: To conclude, this study provides scientific validation of the functionality of green coffee bean extract and recommends the safety of the supplementation in healthy individuals.

Keywords: Overweight; chlorogenic acids; dual-energy X-ray absorptiometry; green coffee bean; safety.