Collagen is an essential component of the skin supporting your skin's structure. With age, the amount of collagen in the skin decreases allowing wrinkles to appear deeper. L'Oréal Collagen Wrinkle De-crease Day cream. A re-plumping moisturiser that helps to plump, smooth and fill wrinkle creases. Enriched with Collagen Biospheres that inflate up to 9x to replump the skin's surface with moisture to help fill out wrinkle creases.