In skin care, face serums are used as potent enhancements to many regimens. These products are formulated with greater amounts of active ingredients, and because they are generally lighter than your traditional face creams, they can penetrate your skin deeper to truly make a difference. Typically applied daily as the last step before moisturizing your skin, these products are versatile and can be used in numerous ways: They can be added to moisturizers, night creams and masks to enhance their potency, used as a spot treatment for problem areas, or utilized as a stand-alone hydrating gel for oily skin. With continued use, serums offer visible results that may not be realized with most creams and lotions alone. There truly are serums for every skin condition. Here are just some of them.