antioxidant · active
Ascorbyl Tetraisopalmitate
Generally safe·Moderate evidence
A fat-soluble vitamin C ester that is more stable than pure ascorbic acid. Published cosmetic assessments note it is well tolerated; it penetrates skin better than water-soluble forms and provides antioxidant support for sun-exposed areas.
References
Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.