Methods for increasing athletic performance, distribution of various Amino Acids to muscles, and solubility of various Amino Acids in a human or animal by administering an amino acid composition that includes: at least one constituent selected from the group consisting of a nitrate, a nitrite, and both； and at least one constituent amino acid selected from the group consisting of Arginine, Agmatine, Beta Alanine, Citrulline, Creatine, Glutamine, L-Histidine, Isoleucine, Leucine, Norvaline, Ornithine, Valine, Aspartic Acid, Cysteine, Glycine, Lysine, Methionine, Proline, Tyrosine, and Phenylalanine.
