Phyto Pro BCAAs, also known as Branched Chain Amino Acids, are a trio of the essential amino acids Leucine, Isoleucine and Valine. “Essential” means they can only be obtained through our diet and the body cannot manufacture them from other amino acids. This product uses of a 2:1:1 ratio, the only BCAA ratio backed up by clinical evidence that shows benefits ranging from increased energy during activity to improved brain and nervous system functioning.