(By: Sarah Anderson) - Amino acids play primary roles both as building blocks of proteins and as intermediates in metabolism. They bond together to make long chains. Those long chains are also called proteins. The 20 amino acids that are found within proteins convey a wide array of chemical versatility. Each of them has its specific characteristics, which provides a unique role in protein structure. Amino acids are used in every cell of your body to build the proteins you need to survive. They help support muscle strength and function through the process of stimulating protein synthesis.