What is it?
Ascorbyl isostearate is a fat-soluble derivative of vitamin C, created by combining ascorbic acid (vitamin C) with isostearic acid (a fatty acid). This combination enhances the stability and skin penetration of vitamin C, making it a valuable ingredient in skincare formulations aimed at brightening and protecting the skin.
Where does it come from?
Ascorbyl isostearate is created by bonding ascorbic acid, which is typically derived from plant-based sources like citrus fruits, with isostearic acid, sourced from vegetable oils. This process results in a more stable, oil-compatible form of vitamin C suitable for cosmetic use.