Universal Nutrition's BCAA Stack, with it's clinically proven ratio of branched-chain amino acids and glutamine, can actually help you increase strength, boost performance, provide energy during dieting, and promote lean mass gains while increasing bodyfat loss. BCAA Stack is perfect for all serious athletes, from the bodybuilder to the marathoner, the gainer to the dieter. Studies have proven that the formula in BCAA Stack can increase nitrogen retention, which in turn helps your body accumulate lean mass. Furthermore, recent studies have shown that the BCAA / glutamine stack could increase strength and positively influence body composition. While taking this powerful stack in addition to a calorie-restricted diet, individuals gained lean mass while dramatically decreasing bodyfat! Whether you're dieting to make weight or are trying to maintain (or even increase) lean mass, studies prove there's no better amino acid combination than the BCAA /glutamine stack.