Ascorbyl Tetraisopalmitate is an oil-soluble Vitamin C that can be used in higher concentrations without drawbacks.Ascorbyl Tetraisopalmitate is one of the most stable derivatives of Vitamin C. Except the general benefits of pure Vitamin C, Ascorbyl Tetraisopalmitate has been shown to offer specific skin brightening benefits. Comparing to the pure Vitamin C, Ascorbyl Tetraisopalmitate will not exfoliate or irritate the skin.