An amino acid composition for collagen formation includes a first chain unit component, a second chain unit component, and a third chain unit component of collagen. The first chain unit component, the second chain unit component, and the third chain unit component are the same or different from each other, and each of the first chain unit component, the second chain unit component, and the third chain unit component is selected from the group consisting of al chain component, α2 chain component, α3 chain component, α4 chain component, α5 chain component, and α6 chain component. The amino acid composition includes Alanine, Phenylalanine, Cysteine, Aspartate, Asparagine, Glutamate, Glutamine, Glycine, Histidine, Leucine, Isoleucine, Lysine, Methionine, Proline, Arginine, Serine, Threonine, Valine, Tryptophan, and Tyrosine and/or the pharmaceutically acceptable salt or ester derivatives thereof.
