Looking for the best biotin supplement? We reviewed nine RD-approved options that support hair, skin, and nails. See our top ...

Biotin, a water-soluble B vitamin otherwise known as B7 ... “Two common signs of a biotin deficiency are hair loss and brittle nails,” says Nazanin Saedi, MD, a board-certified dermatologist and ...

Biotin supports several important functions in the body, but do you need to take it as a supplement? Experts weigh in.

It is called vitamin and mineral deficiency whenever your body doesn't get enough nutrients and stops functioning normally.