Magnesium Ascorbyl Phosphate is a water-soluble stabilized salt of Ascorbic Acid. Unlike some forms of vitamin C that require an acidic pH for activation, Magnesium Ascorbyl Phosphate is effective in a more neutral pH range, between 5-7, making it more suitable for sensitive skin. It is used due to its inhibitory effects on melanogenesis, free radical scavenger activity and collagen stimulation. This form of Vitamin C is a robust choice to ensure stability in the formulation.