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(Ivanhoe Newswire) -- Eating soy-rich foods won't help you lose weight faster, say researchers presenting their findings in this month's issue of the Journal of the American Dietetic Association.
Their new study, completed at St. Luke's-Roosevelt Hospital in New York City, shows overweight women who cut 500 calories a day from their diet and added soy-protein-rich foods every day for 12 weeks did not lose any more weight than women who did not eat extra soy.
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Authors note previous research suggests adding soy to the diet can enhance weight loss. And the FDA approves health claims eating 25 grams of soy protein a day as part of a diet low in saturated fat and cholesterol can reduce the risk of heart disease.
To determine if this is, indeed, the case, researchers compared two groups of overweight women. One group ate a low-calorie diet plus 15 grams of soy for every 1,000 calories consumed. The other group had a low-calorie diet only.
Results reveal the diet rich in soy lowered insulin levels and "bad" cholesterol. But there was no significant difference in the amount of weight loss, fat mass reduction or waist circumference.
The authors conclude, "Our results do not lend support to the emerging notion that soy-protein-rich foods could be considered potential functional foods for weight management, in the quantities consumed in this study."
This article was reported by Ivanhoe.com, which offers Medical Alerts by e-mail every day of the week. To subscribe, click on: http://www.ivanhoe.com/newsalert/.
SOURCE: Journal of the American Dietetic Association, 2007;107:500-505
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