RULE ONE R1 PROTEIN NATURALLY FLAVORED PURE VANILLA - 1950 GRAMSAs Pure as it Gets. This protein formula is as pure as it gets. With 25g of protein and over 6g of BCAAs entirely from intact and hydrolyzed whey protein isolates R1 Protein helps support the recovery and growth aspirations of the most ardant muscle builders. 25g fast acting protein 100% of protein from whey isolates and hydrolysate isolates 6g+ BCAAs