Diets rich in soy protein and soy peptides are reported to be beneficial for weight loss, improved insulin resistance and endothelial function, and reduced blood pressure and blood lipid levels. This artice, recently published in Food & Function from a team in Korea is the first to show the beneficial effects of black soy protein in people maintaining a normal lifestyle.
In this double-blind human trial, participants in the test group were given 4.5 g of black soy protein a day for 12 weeks. It was found that after 12 weeks of supplementation the test group had significant reductions in weight, BMI and body fat mass compared to the placebo group which presented no change. Even after only 6 weeks, the test group showed significant reduction in both BMI and body weight. Additionally, it was revealed that leptin levels were significantly reduced in the test group. This association between leptin and black soy intake could help explain the observed weight-loss activity, as leptin is a vital hormone linked to obesity which regulates energy intake, expenditure, appetite and metabolism.
To read the full paper for free, please click on the link below:
Weight reduction effects of a black soy peptide supplement in overweight and obese subjects: double blind, randomized, controlled study, Jung Hyun Kwak, Chang-Won Ahn, Soo-Hyun Park, Sung-Ug Jung, Byung-Jung Min, Oh Yoen Kim and Jong Ho Lee, Food Funct., 2012, DOI: 10.1039/c2fo10244g
You may also be interested in this Food & Function article which is free to access:
A comparison of satiety, glycemic index, and insulinemic index of wheat-derived soft pretzels with or without soy, Amber L. Simmons, Carla K. Miller, Steven K. Clinton and Yael Vodovotz, Food Funct., 2011,2, 678-683
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