But keep your chins up! (Seriously, fixing your posture may have skin benefits.) We consulted board-certified dermatologist Marisa Garshick, M.D., for her expert tips to restore collagen and keep your skin looking bouncy. Ahead, discover what could make your skin age even faster—and what to do about it: She particularly calls out vitamin C serums, which also play a significant role in your natural collagen production. You see, vitamin C is a vital part of the collagen synthesis process, helping collagen cross-link and support skin firmness. And it doesn’t just stimulate collagen production; it stabilizes the collagen2 you have, leading to overall wrinkle reduction. Here’s a list of the best vitamin C serums on the market, beauty editor tested and approved. And don’t forget about internal hydration, either: If you want even more of a collagen-restoring boost, opt for hyaluronic acid and/or collagen supplements to moisturize your skin from the inside out. Here’s a list of our favorite options, all backed by a nutrition Ph.D. “Wear sunscreen,” says Garshick. “Regular use of sunscreen can help to protect the skin against UV damage that can contribute to collagen loss and the appearance of fine lines, wrinkles, and skin laxity.” We’ll add to that by saying you shouldn’t use sunscreen as an excuse to bake in the sun—natural light exposure is important (vitamin D, and all), but be smart about your time under those rays.