We asked dermatologists how collagen for the skin works, what to look for and how it can improve the look of fine lines, wrinkles, sagging skin and other aging concerns.

Japanese researchers have found that vitamin C can thicken skin by switching on genes that boost skin cell growth, helping reverse age-related thinning. It works by reactivating DNA through a ...

Retinol also increases the skin’s production of collagen, a protein that boosts firmness and elasticity. “Beginning in our 20s, we start to lose about 1 percent of our skin’s collagen per ...