What it is: A custom blend formula with optimal concentration of low and high weighted hyaluronic acid molecules that bind moisture and replenish skin, providing long-term hydration and more supple-looking skin. Skin Type: Normal, Dry, Combination, and Oily. Skincare Concerns: Dryness. Formulation: Lightweight Serum. Highlighted Ingredients: - Custom-blended Hyaluronic Acid: A Dr. Sturm proprietary formulation of long and short chain hyaluronic molecules for intense, long-term hydration with a plumping effect; this serum is tested and proven to have the optimal concentration and viscosity to penetrate the skin. - Purslane: A strong antioxidant with high levels of vitamins A, C, E, and omega-3 fatty acids, it supports skin health and reduces the visible signs of aging. What Else You Need to Know: When used regularly, this serum is an effective means of reducing the look of wrinkles caused by dehydration. Short-chain molecules are able to penetrate into the skin and replenish moisture reservoirs for the long term. Long-chain hyaluronic molecules provide immediate intensive hydration to the surface layers of the skin to give a refreshing effect.