Vitamin C is an effective antioxidant, brightens the skin tone and reduces signs of ageing. In its pure form, vitamin C is unstable in water. The Ordinary’s Magnesium Ascorbyl Phosphate (MAP) is a water-soluble derivative of vitamin C. It is more stable in water but it is less potent than direct L-Ascorbic Acid. It is compatible with water but higher concentrations cannot be offered in a low-viscosity serum format and requires emulsification to form a cream. This formula is a light cream that offers 10% pure MAP (very high solubilized concentration). Aside from the general benefits of pure vitamin C, MAP has been shown to offer specific skin brightening benefits, more so than other derivatives of vitamin C.<br /><br />£26 per 100.00ml