Hydrolyzed Keratin (Keratin hydrolyzed, SpecPure™ HK) is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. This product appears as a light yellow powder.

水解角蛋白（角蛋白水解，SpecPure™HK）是构成人体皮肤外层的关键结构材料。它也是头发和指甲的关键结构组成部分。该产品呈淡黄色粉末。