3-O-Ethyl Ascorbic Acid

3-O-Ethyl Ascorbic Acid is a stabilized, water-soluble vitamin C derivative used in skincare and makeup. Formulators like it for its stability and skin compatibility, and it provides antioxidant support along with visible brightening for uneven tone.
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Ingredient Snapshot

Overview
A stable vitamin C that brightens skin and fades dark spots.
Category
Brightening, Antioxidant, Hyperpigmentation, Tone/Texture
Type
Antioxidant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Visibly brightens and supports a more even-looking skin tone by targeting the appearance of dark spots. Provides antioxidant defense against environmental stressors.

Uses In Skincare & Cosmetics

Found in brightening serums, ampoules, and essences for dull or uneven skin. Also included in lightweight moisturizers and eye-area products, and occasionally in primers for radiance.

Comedogenic Rating

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

Safety

Generally well tolerated, though higher concentrations or low‑pH formulas may cause transient stinging or irritation, especially on sensitive or compromised skin. Patch testing is advisable. No notable cosmetic-use restrictions when formulated appropriately.

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

More stable than L-ascorbic acid and supported by in vitro and small clinical studies for tone-evening and antioxidant activity, so it earns a Good rating. Evidence base is growing but less strong than for pure ascorbic acid.

Products with 3-O-Ethyl Ascorbic Acid

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