Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F is a lightweight oil that helps reduce signs of aging by brightening and balancing uneven skin tone. Unlike direct forms of vitamin C, this hydrating formula contains an oil-soluble vitamin C derivative that converts into vitamin C once applied, giving it less irritation potential. Plus, it has vitamin F—Omega 3 and Omega 6 fatty acids—to help support your skin's natural hydration barrier.