A group of hygroscopic substances that are mainly used for keeping things moist are referred as humectants. As these substances retain moisture, so they are very important constituents of hair care and skincare products. Humectants mainly contain of a number of hydrophilic groups such as hydroxyl, amines, and carboxyl groups. It includes polysaccharides, alcohols, proteins, acids, and other molecules include glycerine, sorbitol, urea, and aloe vera among others. The key applications of humectants are medicines, paints & coatings, cosmetics, pesticides, and food industry. Also, in different formulations, they are used as co-solvents.