Applied Nutrition Critical Mass Gainer Protein Choc is a high-calorie, lean mass gainer designed to help athletes and fitness enthusiasts build quality muscle. Each serving provides 42_g of a blend of fast- and slow-digesting proteins, including ISO-XP whey protein isolate, to support muscle growth and recovery. Carefully formulated with premium ingredients, it delivers the calories and nutrients needed to maximize lean mass gains while supporting overall performance.