Biotin also known as vitamin H or coenzyme R is a water-soluble vitamin B7 (Vitamin H), often recommended for healthy hair. Since biotin deficiency can lead to thinning of the hair, proponents claim that washing your hair with biotin-enriched shampoo can thicken the hair and stimulate hair growth. It is ideal for use in hair shampoos.

生物素又名维生素H或辅酶R，是一种水溶性维生素B7（维生素H），常被推荐用于健康的头发。由于生物素缺乏会导致头发变薄，支持者声称用富含生物素的洗发剂洗头可以增厚头发并刺激头发生长。它非常适合用于洗发香波。