The Ordinary DOUBLE VALUE PACK 2 X Vitamin C Suspension 23% + HA Spheres 2% 30ml Bottles. Vitamin C is an effective antioxidant and its pure form of L-Ascorbic Acid has been shown to reverse multiple signs of skin ageing while brightening the skin when applied topically. This water-free, silicone-free formula provides 23% pure L-Ascorbic Acid which remains completely stable due to the absence of water. The system is supported with addition of dehydrated spheres of Hyaluronic Acid to offer visible surface smoothing alongside the benefits of Vitamin C. This treatment is ideally applied at bedtime. Directions Apply a small amount to face in the AM or the PM. A slight tingling sensation can be expected after application.