Sebum is an oily substance that protect and hydrate the skin’s surface. It mixes with fat molecules, called lipids, to form a protective coating on the skin. The sebaceous glands produce sebum. It ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? Whether you're dealing with a dry, flaky scalp or one that tends to be on the ...

Fact checked by Michelle Regalado Reviewed by Brooke Alpert, MS, RD, CDN Key Takeaways Dairy products can trigger breakouts ...