Hydrolyzed hyaluronic acid in the Hyaluronic Acid Boosting Serum penetrates deeper into the skin, attracting and holding moisture that’s already in the skin, and plumps fine lines from below the skins surface, whereas the HA-Pro Complex™ is a proprietary blend that stimulates the production of the skin’s own hyaluronic acid and delivers 24-hour hydration. The product also contains Ceramides which supports the renewal of the skin’s natural protective layer and forms an effective barrier against moisture loss. The Hyaluronic Acid Boosting Serum also has Niacinamide, a potent, yet calming antioxidant that reduces moisture loss in the skin and improves barrier function. For best results it is recommended that the product is used twice daily which will result in softer, smoother and more hydrated skin long-term. For those with normal or combination skin during warmer months, incorporating Hyaluronic Acid Boosting Serum during the winter months can help combat cold-weather dryness