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Does Glycine max leaves or Garcinia Cambogia promote weight-loss or lower plasma cholesterol in overweight individuals: a randomized control trial

Ji-Eun Kim2, Seon-Min Jeon12, Ki Hun Park3, Woo Song Lee4, Tae-Sook Jeong5, Robin A McGregor1 and Myung-Sook Choi12*

Author Affiliations

1 Center for Food and Nutritional Genomics Research, Kyungpook National University, Daegu, Republic of Korea

2 Department of Food Science and Nutrition, Kyungpook National University, Daegu, Republic of Korea

3 Division of Applied Life Science (BK 21 Program), EB-NCRC, Institute of Agriculture and Life Science, Graduate School of Gyeongsang National University, Jinju, Republic of Korea

4 Eco-Friendly Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, Republic of Korea

5 National Research Laboratory of Lipid Metabolism & Atherosclerosis, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea

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Nutrition Journal 2011, 10:94  doi:10.1186/1475-2891-10-94

Published: 21 September 2011

Abstract

Background

Natural food supplements with high flavonoid content are often claimed to promote weight-loss and lower plasma cholesterol in animal studies, but human studies have been more equivocal. The aim of this study was firstly to determine the effectiveness of natural food supplements containing Glycine max leaves extract (EGML) or Garcinia cambogia extract (GCE) to promote weight-loss and lower plasma cholesterol. Secondly to examine whether these supplements have any beneficial effect on lipid, adipocytokine or antioxidant profiles.

Methods

Eighty-six overweight subjects (Male:Female = 46:40, age: 20~50 yr, BMI > 23 < 29) were randomly assigned to three groups and administered tablets containing EGML (2 g/day), GCE (2 g/day) or placebo (starch, 2 g/day) for 10 weeks. At baseline and after 10 weeks, body composition, plasma cholesterol and diet were assessed. Blood analysis was also conducted to examine plasma lipoproteins, triglycerides, adipocytokines and antioxidants.

Results

EGML and GCE supplementation failed to promote weight-loss or any clinically significant change in %body fat. The EGML group had lower total cholesterol after 10 weeks compared to the placebo group (p < 0.05). EGML and GCE had no effect on triglycerides, non-HDL-C, adipocytokines or antioxidants when compared to placebo supplementation. However, HDL-C was higher in the EGML group (p < 0.001) after 10 weeks compared to the placebo group.

Conclusions

Ten weeks of EGML or GCE supplementation did not promote weight-loss or lower total cholesterol in overweight individuals consuming their habitual diet. Although, EGML did increase plasma HDL-C levels which is associated with a lower risk of atherosclerosis.

Keywords:
atherosclerosis; cholesterol; clinical trial; hydroxyl citric acid; soybean leaves; weight-loss