Ethyl Ascorbic Acid (EAA)
Also known as: 3-O-Ethyl Ascorbic Acid
The trendy newcomer in the vitamin C family โ more stable than L-AA, faster converting than MAP.
What It Does
Deep Dive
A newer stable vitamin C derivative with a good balance of stability and potency. Ethyl ascorbic acid penetrates skin moderately well and converts to ascorbic acid via enzyme cleavage. Marketed as "97% vitamin C" by some brands, which refers to the molar vitamin C content once converted. Reasonable mid-tier pick.
Best For
Pairs Well With
Effective Concentration
1โ5% typical. Stable, moderately penetrating.
