Hyaluronic acid has many key roles in skin health; contributing to the resilience and pliability of your skin, regulating immune and inflammatory responses, maintaining moisture levels, and regulating tissue repair. This remarkable compound. This substance, in addition to keeping our skin soft and wrinkle- free, actually serves to attract water into the skin from the surrounding air. As we age, the level of Sodium PCA drops 50°/, or more. This high-performance humectant is derived from amino acids. It is recommended for dry, delicate and sensitive skin.