Don’t waste money on biotin or collagen supplements, dermatologists say: The better way to get ‘beauty’ nutrients

Supplements that claim to improve appearance have grown in popularity in the past decade. From 2011 to 2020, the percentage of Americans who reported taking a hair, skin and nail vitamin in the past month rose from 2.5% to 4.9%.

But experts warn about side effects and dangers. Skin, hair and nail supplements often contain much more biotin than the human body needs, for example, a research paper published in the Journal of the American Academy of Dermatology has found.