BSN Amino X is a caffeine and sugar free instantised BCAA & EAA formula.BCAAs are Branched Chain Amino Acids. These are L-Leucine, Isoleucine and L-Valine. They help to support muscle by stimulating protein synthesis and reducing muscle breakdown. EAAs are Essential Amino Acids which are L-Taurine, L-Citrulline and L-Alanine. L-Citrulline promotes Nitric Oxide production while L-Taurine supports the uptake of nutrients into muscle cells. L-Alanine converts to Pyruvate in the body to support glucose production during intense training.Manufactured as an effervescent formula, this amino acid supplement allows nutrients to be rapidly and completely absorbed by the body.Caffeine free, with zero calories and zero grams of sugar, BSN Amino X is a great choice for athletes everywhere!