MuscleTech Mass-Tech delivers the highest biological value protein, and it’s the best mass gainer for people who want to add size and achieve a bulkier look. The formula is enhanced with clinically proven HPLC-certifies creatine and contains nutrient-dense muscle-building ingredients. This mass gainer also features ProHydrolase, designed to make the body absorb amino acids 20% better while building mass and improving muscle recovery.