About this item Branched-chain amino acids help trigger muscle protein synthesis and prevent muscle protein breakdown when utilized as part of your training and performance nutrition program. Nsf Certified for Sport. Nsf screens for more than 200 substances banned by most major athletic organizations. Gluten and Soy free and no Certified synthetic colors (colored with black carrot juice concentrate) Per serving, CYTOSPORT Aminos + Caffeine supplement mix offers 5g BCAAs including 3g L-Leucine and 125mg caffeine. The CYTOSPORT performance nutrition system is designed to help you maximize physiological training adaptation to improve strength and endurance. CYTOSPORT Aminos + Caffeine supplement mix helps prepare, perform, recover and maintain.