Eucerin Hyaluron-Filler Vitamin C Anti-Aging Booster Serum contains 10% pure vitamin C which is an effective anti-oxidant and helps the skin's appearance. Also, it has low molecular Hyaluronic acid that penetrates in the epidermal skin layers where wrinkles originated. The sun, pollution, smoking and other aspects of our lifestyles trigger the formation of free radicals. Free radicals cause oxidative stress to skin, accelerate premature skin aging and leave skin looking dull. Eucerin Hyaluron-Filler Vitamin C Booster with 10% pure and freshly-activated Vitamin C has been specially formulated to fight free radicals and address the first signs of aging: it strengthens skin, plumps up wrinkles and gives you a smoother, fresher and more radiant look. Innovative packaging ensures that the pure Vitamin C is freshly-activated on first use. Simply press and shake to combine the Vitamin C powder into a serum of low molecular Hyaluronic Acid, and Licochalcone A. The formula is at its most effective for 21 days. Low molecular Hyaluronic Acid is an effective moisturizer that plumps up wrinkles in the epidermal (outermost) layers of skin. Another proven anti-oxidant, Licochalcone A, works alongside Vitamin C to neutralize the free radicals caused by UV and high-energy visible (HEVIS) light. Eucerin Hyaluron- Filler Vitamin C Booster is suitable for all skin types and is clinically and dermatologically proven to strengthen skin and plump up wrinkles. Skin becomes smoother, fresher and more radiant in just seven days and results improve over time.