What are vitamin C derivatives and are they as effective?

Vitamin C derivatives like ascorbyl glucoside, sodium ascorbyl phosphate, and ascorbyl tetraisopalmitate are stabilized forms that convert to active vitamin C in the skin. They are gentler and much more stable than L-ascorbic acid, making them good options for sensitive skin or those who find pure vitamin C irritating. However, conversion efficiency varies and they are generally considered slightly less potent than the pure form.