Most of the cells of the muscles, tissues, and cells are made up of amino acids. Amino acids give the cells their structure. They are essential for every metabolic process. They help transport and store nutrients, and aid the function of glands, organs, arteries, and tendons. They help in repairing tissues and healing wounds especially in the muscles, skin, and bones. Some of the essential amino acids include Arginine, Glutamine, Ornithine, Carnitine, Methionine, and Taurine. Inadequate intake of amino acids leads to skin wrinkles, hair loss, and a host of other diseases.