I switched from using whey protein to soy protein powder and have noticed that I gained approx 2 lbs! I haven't done anything else different and wonder if it could be the soy? Thanks for your feedback.

Hi maureen, I doubt it, ulness your soy protein powder contains additional carbohydrate ingredients. A 3 block serving of protein powder usually contains only a couple grams or so of carbohydrate if any at all, and is fat free. Soy protein actually helps provide better insulin control. It's explained in THE SOY ZONE.