Hair ingredient is keratin, contain a variety of amino acids and dozens of trace elements.

头发主要成份是角蛋白，含有多种胺基酸及几十种微量元素。

youdao

Hair ingredient is keratin, contain a variety of amino acids and dozens of trace elements.

头发主要成份是角蛋白，含有多种胺基酸及几十种微量元素。

youdao