GNC is a major name in the supplement market and the new Beyond Raw line is ideal for bodybuilders. The products are designed to be stacked together as needed. There are fat burners, lean muscle stimulators and mass gainers. Re-Built Mass is all about promoting muscle growth. We find several common ingredients, but the way GNC puts these ingredients together is astounding. Creatine and protein are the main ingredients. When we look at creatine we look for monohydrate, ethyl ester and micronized and we found all three in this supplement.