Serums are usually formulated with a specific skin concern or condition in mind, and are designed to be used in conjunction with other skin care products to optimize results. Some common uses for serums include improving the appearance of skin discoloration, fine lines and wrinkles, acne, excess oil, redness, or rough surface texture. Vitamin C serums are an important and effective way to provide the skin with antioxidants to help prevent environmental damage, while hyaluronic acid serums are used to enhance skin hydration and targeted corrective benefits for all skin types. There are also serums that combine multiple ingredients to provide improvement for specific combinations of concerns (such as acne and visible signs of aging) as well as comprehensive anti-aging benefits. Serums can also be formulated for specific areas of the face, such as around the eyes or for the lips.