Since hyaluronic acid rubs on the face only work on the epidermis and do not penetrate deep into the skin, they do not have side effects. In medical beauty, hyaluronic acid is used for wrinkle removal, filling and hydration injection. In addition, we often see the figure of hyaluronic acid in many cosmetics. In addition to cosmetics with added hyaluronic acid ingredients, some manufacturers also produce hyaluronic acid that can be applied directly to the skin’s epidermis, but hyaluronic acid in cosmetics only works on the epidermis, and it is difficult to penetrate deep into the skin. Therefore, in order to achieve a hydrating effect, hyaluronic acid needs to be injected into the skin for a better moisturizing and filling effect. When you choose to use these cosmetics and skin care products containing hyaluronic acid, you must choose the products produced by regular manufacturers and approved by the Drug Administration to be listed for use. In addition to cosmetics and skin care products for daily use, if you want to solve the problem of skin dehydration, you can also choose hydrophobic injections for scientific hydration through medical beauty.