A naturally occurring molecule that can hold 1,000 times its weight in water. It helps provide hydration, improve the look of fine lines and wrinkles, and improve skin texture and elasticity. It is the optimal hydrator for all skin types. In addition, hyaluronic acid provides an antioxidant defense against environmental aggressors. Dr. Nassif’s formulates with different molecular weight hyaluronic acid. The lowest weight HA absorbs easily onto lower layers of the epidermis to help optimize hydration, while the highest weight HA is known to hold 1,000 times its weight in water. It draws moisture from the air and delivers it to the skin for continuous moisturization.