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February 26, 2007
Soy may help prevent weight gain, diabetes
An article published online on February 26, 2007 in the Journal of the Science of Food and Agriculture reported the finding of researchers in Korea that black soy bean protein given to rats on a fatty diet helped prevent weight gain and lowered cholesterol.
Shin Joung Rho of Hanyang University in Seoul and colleagues gave 32 male rats a diet containing 36 percent fat and 1 percent cholesterol. The diet provided 2, 6 or 10 percent of its calories as a black soy peptide. A control group of rats received the diet with 20 percent of its calories as casein. The animals consumed the diets for 28 days.
At the conclusion of the investigation, rats who consumed soy had less weight gain compared to those that received the casein-enriched diet, as well as lower total cholesterol and serum LDL to HDL ratio. After two weeks, rats in the group whose diets provided 10 percent of their calories from soy had gained half the amount of weight as animals in the control group. Rats in this group experienced a reduction in total cholesterol of 25 percent and a 60 percent decline in LDL.
David Bender, who is sub-dean at the Royal Free and University College Medical School, London, believes that soy protein may be affecting liver and adipose tissue fat metabolism, reducing the synthesis of new fatty acids and cholesterol, which may explain the traditional use of black soy in Asia as a diabetes treatment. "The key problem in type II diabetes is impairment of insulin action, mainly as a result of excess abdominal adipose tissue - so loss of weight often improves glycemic control," Dr Bender observed.
The authors concluded "that black soy protein can be a potent nutraceutical component for anti-obesity and hypolipidaemic benefits."
Soy may help prevent weight gain, diabetes
An article published online on February 26, 2007 in the Journal of the Science of Food and Agriculture reported the finding of researchers in Korea that black soy bean protein given to rats on a fatty diet helped prevent weight gain and lowered cholesterol.
Shin Joung Rho of Hanyang University in Seoul and colleagues gave 32 male rats a diet containing 36 percent fat and 1 percent cholesterol. The diet provided 2, 6 or 10 percent of its calories as a black soy peptide. A control group of rats received the diet with 20 percent of its calories as casein. The animals consumed the diets for 28 days.
At the conclusion of the investigation, rats who consumed soy had less weight gain compared to those that received the casein-enriched diet, as well as lower total cholesterol and serum LDL to HDL ratio. After two weeks, rats in the group whose diets provided 10 percent of their calories from soy had gained half the amount of weight as animals in the control group. Rats in this group experienced a reduction in total cholesterol of 25 percent and a 60 percent decline in LDL.
David Bender, who is sub-dean at the Royal Free and University College Medical School, London, believes that soy protein may be affecting liver and adipose tissue fat metabolism, reducing the synthesis of new fatty acids and cholesterol, which may explain the traditional use of black soy in Asia as a diabetes treatment. "The key problem in type II diabetes is impairment of insulin action, mainly as a result of excess abdominal adipose tissue - so loss of weight often improves glycemic control," Dr Bender observed.
The authors concluded "that black soy protein can be a potent nutraceutical component for anti-obesity and hypolipidaemic benefits."
