Glycerin, also known as glycerol, is a colorless, odorless liquid that is sweet-tasting and viscous. It is a natural compound derived from fats and oils during the process of saponification, which is used to make soap. Glycerin is commonly used in food, pharmaceuticals, and cosmetics due to its ability to retain moisture and enhance texture. In addition to its uses in various industries, glycerin is also a humectant, meaning it helps to keep things moist. It is often found in skin care products, where it helps to hydrate the skin, and in food products, where it acts as a sweetener and preservative.