The present invention provides an amino acid composition for collagen formation. The amino acid composition includes a first chain unit component, a second chain unit component, and a third chain unit component. 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 α1 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.本發明公開一種用於形成膠原蛋白的氨基酸組成物，其包括：第一鏈單元組份；第二鏈單元組份；以及第三鏈單元組份；第一鏈單元組份、第二鏈單元組份及第三鏈單元組份是彼此相同或相異，且各自選自由：α1鏈組份、α2鏈組份、α3鏈組份、α4鏈組份、α5鏈組份以及α6鏈組份所組成的群組；氨基酸組成物包含：丙氨酸、苯丙氨酸、半胱氨酸、天門冬氨酸、天冬醯氨、麩氨酸、麩醯氨酸、甘氨酸、組氨酸、白氨酸、異白氨酸、賴氨酸、甲硫氨酸、脯氨酸、精氨酸、絲氨酸、蘇氨酸、纈氨酸、色氨酸及酪氨酸。
