The first rule in bodybuilding is Input = Output. Rule 1 Protein is a superior protein that includes the nutrition you put into your body to create the perfect protein supplement. That's why R1 Protein contains one of the purest, most rapidly digested fuels around to help build and repair muscle. And with virtually zero lactose, sugar, fat, or cholesterol, it's the most complete muscle fuel to add to your routine.
Rule 1's flagship protein is made with super-pure 100% whey isolate, fast-acting whey hydrolysate, and virtually nothing else. It is completely omitted with the use of whey concentrates as well as creamers, gums, amino spiking, and other fillers that dilute what you really came for – protein. The result is an industry leading Protein Purity Percentage (PPP) of up to 87%. R1 Protein is protein with a capital-P.