Stacker 2 features a new amino acid formula that contains 11g of the most essential and necessary amino acids per serving. It specifically contains no less than 5.7g of glutamine and 4.5g of BCAA amino acids in a 3:1:1 ratio. There are eight essential amino acids, amino acids that the body does not produce and must be obtained through diet. Glutamine makes up 80% of muscle and adequate amounts are crucial for training efficiency. Leucine, which is present, is the most important of the BCAA amino acids. Its presence helps increase protein synthesis in the muscles, protects against muscle catabolism, and increases muscle strength and energy. The Essential Aminos formula also contains non-essential amino acids that contribute to a number of physiological functions. For example, L-isin helps increase energy and metabolism, L-methionine accelerates amino acid conversion, L-phenylalanine supports the function of brain neurotransmitters, and L-tryptophan is important for the synthesis of serotonin. Dosage: 1 scoop before and after training in 250ml of water.