I have been using this product for about 2 months now and since I started weight training I've gained about 10 pounds. People may say that when you cut you can't gain muscle and that's a lie I eat about 2,500 calories now instead of 3-4 thousand a day. And ever since I started training i've went from 155lbs to 165lbs. This is a very good product if you are willing to put on mass.