Ingredient
3-O-Ethyl Ascorbic Acid
3-O-Ethylascorbic Acid
EAA
Ethyl Ascorbic Acid
What it is
A stable, oil- and water-soluble vitamin C derivative used in brightening ampoules and serums as an alternative to pure L-ascorbic acid.
How it works
Its ethyl group protects the vitamin C molecule from rapid oxidation while still allowing it to convert to active ascorbic acid in the skin, where it supports antioxidant defense and a more even tone.
What it does
Skin conditioning
Antioxidant
Concerns to know
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Well tolerated
No significant safety concern is reported for this ingredient as used in cosmetics.