Betaine can rapidly improve the moisture retention ability of skin and hair, has unique properties of moisturizing and protecting cell membranes, and can increase the solubility of active ingredients in water, reduce the irritation of surfactants or fruit acids to skin.  Betaine has been widely used in skin care products, hair care products and oral care products and other personal care products. 

Organic osmotic substance is a kind of substance that protects metabolic activity in cell and resists osmotic pressure to stabilize macromolecular structure.  Such as sugars, polyols, amino acids and derivatives, betaine is a major organic permeate.  Scientific studies have shown that the more dry or salty the environment, the higher the betaine content in biological cells.  Skin cells accumulate or release organic osmotic substance to change the concentration of osmotic substance inside the cell, thus dynamically maintaining the volume of the cell and water balance.  In the external high osmotic pressure, such as dehydration of skin epidermis layer or exposure to ultraviolet radiation, it will cause a large amount of osmotic loss of skin cells, resulting in epidermal cell apoptosis, and betaine osmotic can significantly inhibit this process.  

Betaine is used in personal care products as an organic osmotic substance to achieve the osmotic balance of protecting cells through the penetration of skin cuticle, so as to increase the water content of surface skin.Betaine's unique moisturizing mechanism makes its moisturizing performance different from that of common moisturizers.Compared to sodium hyaluronate, betaine has a long-lasting moisturizing effect even at very low concentrations.