Every week more than a dozen patients ask Shilpi Khetarpal, a dermatologist at the Cleveland Clinic, about collagen supplements.
She tells them they are usually not worth it.
Our bodies naturally contain collagen, which is a protein that provides support to skin, bones and muscles.
Levels start falling in our 30s, and for women, the decline accelerates after menopause.
Lower collagen levels can contribute to wrinkly skin, thinning hair and joint pain as we age.