R1 GainNo ifs. No buts. No BS. That is Rule 1s guarantee and you can see why when you look at their R1 Gain ingredient profile. 100% Whey Blend Added BCAAs + Glutamine High Quality Carbohydrates R1 Gain was created for individuals who are struggling to hit their protein target for the day but need more calories as well. Combining a 1 to 1. 5 ratio of protein to carbohydrates, R1 Gain utilises a whey only protein blend and couples it with high performance,