Powerful age defying serum containing Vitamin C to boost firmness and neutralize free radicals, this light weight serum also contains hyaluronic acid and Vitamin B5 to hydrate and sooth. Skin Type Indications : All Skin Types BENEFITS Magnesium ascorbyl phosphate appears to have the same potential as other forms of Vitamin C, to boost skin collagen synthesis, but is effective in significantly lower concentrations. Magnesium ascorbyl phosphate is converted to natural acid Vitamin C in the skin. Vitamin C is also a potent antioxidant.