The Ordinary Vitamin C Suspension 23% in HA Spheres (30 ml) is a water-free formula that delivers 23% pure L-Ascorbic Acid to brighten dull skin, reduce signs of aging, and even out tone. Supported with hyaluronic acid spheres for added hydration, this powerful antioxidant treatment helps improve skin texture and radiance. Apply a small amount to the face at night after water-based serums; a slight tingling may occur.