Serums are very light active concentrates that provide the highest possible concentration of active ingredients and are readily absorbed by the skin. As they provide supplementary care for all skin types, they can be used to balance specific skin needs in “special” life situations. In contrast to masks, they not only have an instant effect but also supply the skin with long-lasting, concentrated moisturizing power. Serums should generally be applied after cleansing and before applying a moisturizer.