All protein may not be created equal when it comes to weight loss. Whey, or milk, protein may offer people who want to slim down a slight edge over soy, a new study shows. Researchers at the U.S. Department of Agriculture’s Human Nutrition Research Center randomly assigned 90 overweight and obese middle-aged adults to one of three groups. The first group was asked to add protein drinks made with whey to their normal diets, the second group drank protein drinks made with soy protein, and the third group drank carbohydrate drinks. Study participants weren’t told which group they had been assigned to. All the drinks, which were drunk twice daily, at breakfast and dinner, had the same number of calories: 200. They also all had had 52 grams per packet, for a daily total of 104 grams of added protein or carbs.
