SheFinds: What's Causing Your Wrinkles And Sagging Skin? These Common Triggers Might Be to Blame

“The best medicine for your skin's collagen is prevention, i.e. sunscreen,” Casey says. “A broad spectrum (protects from both UVA and UVB rays) sunscreen with SPF 30 or higher prevents the UV rays of the sun from penetrating into your skin and causing collagen and elastic fiber breakdown.”