Hyaluronic acid serum for the face from Ooz Natural: a serum for the face from Ooz Natural, restores the healthy glow to your skin as it works to hydrate the skin, fill fine lines and wrinkles, and stimulate the skin to produce more collagen to make it more elastic and plump. It comes with a unique formula of hyaluronic acid, vitamin C, and E, in addition to a blend of green tea. An ideal choice for soft, fresh, and lively skin. Suitable for mature skin. I clean and prepare the skin, then apply a thin layer of serum on the skin or the targeted area. Let it dry. You can then apply moisturizer. Better results: apply twice a day.