Amino acids are the building blocks of protein and amino liquid supplements provide your body with amino acids in its purest and best absorbable/utilizable form to maximize athletic performance, muscle growth and optimize protein synthesis. When you supplement amino acids in liquid or tablet form, your body doesn't have to break down the protein into amino acids. Amino acids are also responsible for the production of digestive enzymes. So your body needs amino acids in order to get more amino acids from normal food and that's why amino liquid can improve your metabolism. Find more sports nutrition related topics at nutrition main, or click here to learn more about sports supplements.