In addition to testing each and every product that's included in each and every review, we rely on experts who shape their fields, including dermatology, cosmetic chemistry, and medicine, to help us vet the ingredients and formulas. Unlike topical collagen, these ingredients are known to restore firmness and smooth wrinkles and have dozens of studies to substantiate this. The formula pairs collagen with peptides—"a type of protein that works to improve elasticity by stimulating the creation of c...