Researchers at the United States Department of Agriculture have published the results of a double-blind, randomized clinical trial showing that whey protein¹—but not soy protein—is a powerful tool to help weight-loss efforts.

The study involved 90 overweight and obese participants who received either 56 grams per day of whey protein, 56 grams per day of soy protein, or 56 grams per day of carbohydrates for 23 weeks. These nutrients were consumed in two smoothie beverages during the day. Other than that, the participants were given no dietary advice and could eat anything else they wanted.

At the end of the study, those consuming whey protein were 4-5 pounds lighter, their waistlines were smaller, and their hunger was better under control (lower ghrelin levels). It is rather amazing that such progress could be made even though there was no effort to actually eat better.

This study is the latest in an impressive body of research in humans on the benefits of whey protein for metabolic fitness, which includes improving insulin resistance and lowering cholesterol, as well as helping weight loss.

Posted by Byron J Richards at 04:20 PM.

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