The Ordinary Vitamin C Suspension 23% + HA Spheres 2% is a high-strength, water-free vitamin C formula designed to brighten dull skin, even skin tone, and help reduce signs of aging. It combines 23% L-ascorbic acid with hyaluronic acid spheres (2%) for hydration and a subtle plumping effect. For nighttime use, apply a thin layer to clean, dry skin and follow with moisturizer. May cause tingling; use gradually if you have sensitive skin. This product features a stable, silicone-free suspension that delivers active vitamin C to the skin.