Introduction   Glycerol, also known as glycerin or glycerine, is a naturally occurring compound found in all lipids (fats) in the body. It is a colorless, odorless, sweet-tasting, viscous liquid. Structurally, glycerol is a triol, meaning it has three hydroxyl groups. These hydroxyl groups make glycerol an excellent humectant, meaning it attracts and retains moisture. This property makes...