A method for increasing the vasodilative characteristics of amino acids in a human or animal is disclosed. The method includes administering to the human or animal a pharmaceutically effective amount of an amino acid compound consisting essentially of a nitrate or nitrite of an amino acid selected from the group consisting of Arginine, Agmatine, Beta Alanine, Citrulline, Creatine, Glutamine, L-Histidine, Isoleucine, Leucine, Norvaline, Ornithine, and Valine.
