Put simply, peptides are chains of proteins that are present in all animals. They are essential in the body as they can perform a wide variety of functions from regulating hormones to working as an antibiotic.
In skin care, peptides are used to reduce wrinkles and improve skin quality, making them a popular ingredient in anti-aging products. They trick your skin into producing more collagen, which naturally plumps up wrinkles and fine lines. You can find them in serums, moisturisers and cleansers.