Polymer

Hydration

Mitigation

Protective function

Calming

Hair conditioning

Increases elasticity

Polyquaternium-51 is a moisturizing polymer that has a strong affinity for the skin due to its structure, similar to phospholipids in the cell membrane. In cosmetics, it is used as an intensive moisturizer and conditioner, especially for dry, sensitive, or damaged skin. It forms a thin, breathable film on the surface that retains moisture, reduces transepidermal water loss, and softens the skin. It is often used in moisturizing creams, serums, aftershave products, and hair care products for shine, elasticity, and reduced frizz.