CIRCULAR HYDRA SERUM. Benefits: Full-circle hydrating serum utilizes an enhanced form of Hyaluronic Acid to penetrate skin's surface for deep hydration and more supple, radiant skin over time. Immediately hydrates to quench dehydrated skin. Provides hydration that lasts throughout the day and beyond. Replenishes skin from within. Key Ingredients: Hyaluronic Acid: penetrates skin's surface for deep hydration and more supple, radiant skin over time. Algae Extract: infused moisturizing matrix delivers quick and long-lasting hydration. Kelp Serum: source of minerals, amino acids and vitamins including A, C, E and thiamin. Research Results: Deeply hydrates skin for 10+ hours and increases hydration levels over time* *Independent clinical test, 30 subjects, 2 applications/day. Hydration measurements taken via corneometer before application and at 20 minutes, 2 hours and 10 hours..