Milk, as colloidal mixture of proteins, lipids and vitamins is applied by known cosmetic producers. In cosmetics, milk occurs as moistening and biologically active agent (i.e. the source of vitamins and proteins), which is able to rebuilt structural proteins of skin. Moreover, milk products, such as lactose, casein or whey are potential cosmetic raw materials. Whey, which is a waste from dairy industry is a valuable raw material for further processing. Chemically, whey contains lactose, proteins, fats, lactic acid, group B vitamins and minerals, so it can be a natural source of valuable cosmetic components. Apart from biological activity, also other functional properties of whey proteins like binding of water, foams stabilizing and emulsifying properties are worth attention. The application of whey as the cosmetic raw material from one side affords another way of whey utilization and on the other side it allows to obtain natural cosmetic products.