NEW Factory Sealed L Oreal Collagen Filler Lip Treatment. Collagen is the essential natural protein that keeps skin smooth and looking youthful. But as we age collagen deteriorates plus skin starts to lose its moisture: Skin surfaces become uneven, skin loses its cushion and wrinkles are formed. Natural collagen is extracted and purified with a process that preserves all of its hydrating qualities. Now, Collagen Moisture Filler with powerful natural collagen provides a daily dose of intense hydration that helps fill in lines and wrinkles and restores moisture for smoother, more cushioned skin