Ascorbyl Tetraisopalmitate is an oil-soluble derivative of Vitamin C that can be used in higher concentrations without drawbacks One of the most stable derivatives of Vitamin C It is provided in this oil-format formula in combination with Vitamin F, also known as essential fatty acids Ascorbyl Tetraisopalmiate has also been shown to offer specific skin brightening benefits Directions Apply a few drops to the entire face in the AM and/or PM. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised.