Your biotin needs might be higher if you have low levels, like between 5,000 to 10,000 micrograms (5 to 10 milligrams), according to Jaliman. Here are some other reasons you might need to pay special attention to biotin levels: Also, keep an eye out for supplements with both biotin and collagen, which is the main structural protein in the skin.* Collagen contains amino acids that are necessary for keratin production and, therefore, hair growth.*
