BCAA's (Branched Chain Amino Acids) are the amino acids leucine, iso-leucine and valine. They are absolutely essential for the process of protein synthesis which is the process that builds new muscle and repairs muscle tissue damaged when training. See More BCAA's have been shown to be anti-catabolic and can greatly reduce delayed onset muscle soreness (DOMS).BCAA’s have become very popular in recent years due to their exceptional positive effects on enhancing recovery, endurance, muscle growth and reducing muscle wastage. BCAA’s are typically available in a ratio of 2:1:1 of leucine:iso-leucine:valine which is the ratio that has been the most studied and widely accepted as having the greatest effect on performance and musculature. Other forms are available such as 3:1:2, 4:1:1 and even 8:1:1 though there is less research on these ratios.