GNC Pro Performance 100% Whey Protein is a macronutrient rich protein formula that is enriched with high content of naturally occurring amino acids that are needed by the body to perform various functions. When you’re on a fitness journey, including whey protein supplements becomes an indispensable part. They prove to be a catalyst for muscle growth and protein synthesis in your body and regardless of the age or gender you can definitely find a suitable whey protein supplement for yourself.