Sodium Hyaluronate (Cosmetic Grade) is categorized by molecular weight: high (>1000kDa), medium (500-1000kDa), and low (<500kDa). High-MW forms a breathable moisture barrier, medium-MW enhances stratum corneum hydration, while low-MW penetrates deeper to stimulate collagen production. With exceptional film-forming, lubricating, and reparative properties, it significantly improves skin radiance, elasticity, and wrinkle reduction. Widely used in serums, masks, and creams, it is ideal for anti-aging, barrier repair, and daily hydration.