Glycerol, also known as glycerin, is a colorless, odorless liquid that is sweet-tasting and viscous. It is a simple polyol compound, meaning it contains multiple hydroxyl (–OH) groups. Glycerol is commonly found in natural fats and oils, where it serves as a backbone for triglycerides, which are the main constituents of body fat in humans and animals. In addition to its role in biology, glycerol has various applications in food, pharmaceuticals, and cosmetics. It is often used as a humectant, which helps retain moisture, and as a sweetener in food products. Glycerol is also utilized in the production of soap, toothpaste, and skin care products due to its moisturizing properties.