Stacker 2 features the new amino acid formula that contains 11g of the most essential and necessary amino acids per dose. Specifically, it contains: 5.7g. of glutamine 4.5g of BCAA amino acids in a 3:1:1 ratio There are eight essential amino acids that the body does not produce and must be obtained from the diet. Glutamine is one of them, being responsible for 80% of muscle mass. It is important because, without sufficient amounts, the body breaks down all other amino acids for energy during training. Even BCAAs are destroyed without sufficient glutamine. L-Leucine, present in the formula, is the most important of the three BCAA amino acids, because muscle cells respond specifically to it. The more leucine enters the muscles, the more protein is synthesized. BCAAs protect the body from muscle catabolism and increase muscle strength and energy. A sufficient amount of BCAAs inhibits the production of catabolic proteins, reducing fatigue and cramps after training. In addition, the Essential Aminos formula contains non-essential amino acids, which contribute to numerous physiological functions: Lysine helps increase energy and metabolism. Methionine accelerates the metabolism of other amino acids. Phenylalanine positively influences psychological state. Tryptophan produces serotonin, an essential hormone that reduces catabolism and increases recovery. Dosage: 1 scoop before and after training in 250ml of water.