Amino acids are essential components of proteins and are composed of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. Valine (6 letters), Threonine (9 letters), Lysine (6 letters), Leucine (7 letters), and Arginine (8 letters) are all essential amino acids. Valine is an aliphatic amino acid that helps to regulate metabolism and is important for muscle growth. Threonine is a hydrophilic amino acid that helps to maintain the structural integrity of proteins. Lysine is an essential amino acid that helps to build muscle and is important for calcium absorption. Leucine is a branched-chain amino acid that helps to regulate blood sugar levels and is important for muscle growth. Arginine is an essential amino acid that helps to build proteins and is important for wound healing.