Both creams and lotions are emulsions of water and oil. Rich creams are often water-in-oil emulsions, which means that they contain an oil base into which water is incorporated. As a result, they are particularly rich in lipids (fats), have replenishing properties and help reduce transepidermal water loss. Creams based on a water-in-oil emulsion are therefore particularly suitable for very dry skin. A lotion or a fluid is usually an oil-in-water emulsion, so it has a lot of moisture and only a little bit of lipids. This means that a lotion is quickly absorbed by the skin and provides it with intensive hydration. A lotion works very well on oily skin.