can biotin cause a rash
Dr. Jessica J. Krant, a board-certified dermatologist at the Laser & Skin Surgery Center of New York, has heard of this happening, too. âMany reports indicate that excess ingested biotin can lead to rashes and acne breakouts,â she said. âThere are no real scientific, blinded, placebo-controlled research trials to prove this, but if you start taking biotin and get worsening of your acne, the biotin may indeed be the culprit.â.