Valine – Uses, Benefits, Sources and Dosage Valine is a branched chain amino acid and closely related to leucine and isoleucine in both structure and function. These three branched amino acids in our body comprised approximately 70 percent of the amino acids. These amino acids are hydrophobic in nature and present in the interior of proteins. Valine was discovered in 1901 by Emil Fischer, a German scientist. It is among the essential amino acids and can’t be synthesized by body