3-O-Cetyl Ascorbic Acid

3-O-Cetyl Ascorbic Acid is an oil-soluble vitamin C derivative made by attaching a cetyl (C16) chain to ascorbic acid. It offers antioxidant support and helps even out the look of skin tone, holding up better than plain vitamin C in oil-rich formulas.
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Ingredient Snapshot

Overview
An oil-friendly vitamin C that brightens dull, uneven-looking skin.
Category
Antioxidant, Brightening, Hyperpigmentation, Skin Conditioning
Type
Antioxidant

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

May reduce the appearance of dullness and uneven patches, contributing to a brighter look over time. Also offers antioxidant defense against environmental stressors that can impact skin’s appearance.

Uses In Skincare & Cosmetics

Common in serums, face oils, and moisturizers, sometimes combined with vitamin E or ferulic acid. Its oil compatibility suits anhydrous treatments and emulsions designed for radiance-focused routines.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Generally considered well tolerated and widely used in cosmetics. Lower sting potential than highly acidic vitamin C formats, but patch testing is sensible for sensitive skin. No specific regulatory restrictions are widely noted.

Is 3-O-Cetyl Ascorbic Acid a Good Ingredient?

It rates Fair because early data and user outcomes are promising but less strong than for well-studied forms like L-ascorbic acid. While stability is an advantage, conversion in skin and visible results can be variable.

Products with 3-O-Cetyl Ascorbic Acid

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