Ascorbyl Tetraisopalmitate

Ascorbyl Tetraisopalmitate is a highly stable, oil-soluble vitamin C derivative created by esterifying ascorbic acid with four isopalmitic acid molecules. This multi-esterification creates an exceptionally lipophilic molecule that penetrates deeply into skin's lipid layers without requiring enzymatic conversion, making it more stable than L-ascorbic acid and less prone to oxidation. Formulators favor it for premium anti-aging products because it delivers vitamin C benefits in anhydrous formulations and rich creams while remaining stable at room temperature, though it comes at a significantly higher cost than other vitamin C derivatives.