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Ethyl Ascorbic Acid

Also-called-like-this: Form of Vitamin C, 3-O-Ethyl Ascorbate, EAC
What-it-does: antioxidant, skin brightening


A very stable and promising form of the skincare superstar, Vitamin C. If you do not know why Vitamin C is such a big deal in skin care, you can catch up here. In short, Vitamin C has three proven magic abilities: antioxidant, collagen booster, and skin brightener. The problem, though, is that it's very unstable, turns brown and becomes ineffective in no time (after a few month) and the cosmetics industry is trying to come up with smart derivatives that are stable and have the magic properties of pure Vitamin C. 

Ethyl Ascorbic Acid or EAC for short is an "etherified derivative of ascorbic acid" that consists of vitamin C and an ethyl group bound to the third carbon position. This makes Vitamin C very stable and soluble in both water and oil.

However, for a Vitamin C derivative to work it's not enough just to be stable, they also have to be absorbed into the skin and be converted there to pure Vitamin C. We have good news regarding the absorption: on top of manufacturer claims, there is some data (animal study) demonstrating in can get into the skin, and it seems to be better at it than Ascorbyl Glucoside, another vitamin C derivative.

Regarding conversion, we can cite only a manufacturers claim saying that EAC is metabolized in the skin into pure ascorbic acid (and the ascorbic acid content of EAC is very high - 86,4% - compared to the usual 50-60% Vitamin C content of other derivatives). 

As for the three magic abilities of Vitamin C, we again mostly have only the manufacturer's claims, but at least those are very promising. EAC seems to have both an antioxidant and anti-inflammatory effect, and it's claimed to be able to boost the skin's collagen production. The strong point of EAC though is skin brightening. On top of manufacturer claims, there is also clinical in-vivo (tested on real people) data showing that 2% EAC can improve skin tone and whiten the skin. 

Overall, Ethyl Ascorbic Acid is a very promising but not a fully proven Vitamin C derivative. It's worth a try, especially if you are after Vitamin C's skin-brightening effects. 

Show me some proof

  • Journal of Cosmetic Dermatology, Volume 11 (4) – Dec 1, 2012, Stability, transdermal penetration, and cutaneous effects of ascorbic acid and its derivatives

Products with a known amount of Ethyl Ascorbic Acid

Other products with Ethyl Ascorbic Acid

La Clinica 30% Vitamin C Anhydrous Humectant Serum Primark Vitamin Enriched Moisturising Primer Rohto Melano CC Brightening Lotion Rohto Mentholatum Hada Labo Shirojyun Premium Whitening Essence Rohto Mentholatum Melano CC Concentration Measures Toner Trinny London 30% Vitamin C Serum Boost Up True Care Brightening Vitamin-C Serum Wellwell Vitamin C 20% Face Serum With Niacinamide 5%,ceramides And Squalene Éclat Natural Skincare Vitamin C 20% 2beaute Vit C Serum A&M Beauty Wellness BB Crystal Cactus Whitening Ampoules Adara C Bright Serum Alissa Beauté Perfection Vitamin C Booster Alpha-H Vitamin C Serum With 10% Ethyl Ascorbic Acid Anai Rui Vitamin C Serum 20% Aurelderma Lumiedge Skin Gel For Sheer Radiance Aveil Exfol A Serum Avoskin Intensive Divine Day Cream Avoskin Luminous Emulsion Night Cream Avoskin Perfect Hydrating Treatment Essence Basiclab Esteticus Antioxidant Compensating Serum With 15% Vitamin C Basiclab Esteticus Antioxidant Compensating Serum With 20% Vitamin C Be Minimalist 10% Vitamin C Face Serum For Glowing Skin Be Minimalist Vitamin C (Ethyl Ascorbic Acid) 10% + Acetyl Glucosamine 1% Be Minimalist Vitamin C + E + Ferulic 16% Beauty of Joseon Light On Serum : Centella + Vita C Bebak C Vitaminli Aydınlatıcı Serum Bhumi C+ Brightening Booster Bielenda 4% Serum Rozjasniajace Z Wit C Bielenda Couperose Skin - Serum - Reducing The Visibility Of Capillaries Bielenda Dr Medica Capillaries Dermatological Face Serum Reducing Skin Redness Day Night Bielenda Professional Supremelab Energy Boost Brightening Serum With Vitamin C Biopelle Tensage Antioxidant Defense Serum Biotrade Pure Skin Glow Serum Body Veda Centella & Vitamin C Serum Shot Boots Advance Plus Anti-wrinkle Booster Serum Bring Green Toning Vita 20% Brightening Serum BusyBody Vitamin C Anti Pigmentation & Acne Serum COSMD 15% Vitamin C + Ferulic Acid High-potency Antioxidant Brightening Serum Catrice Glow Vit C Power Shots Chemist at Play Brightening Face Serum Chemist at Play Brightening Face Serum Colibri Cosmetics Vitamin C Serum Colibri Cosmetics Vitamin C Serum Conscious Chemist Brightening & Firming Serum | 10% Vitamin C, Peptides & Anti-oxidants Conscious Chemist Vivid C Pro Collagen Serum Control zero C The Sun Serum Cv Vitamin C Booster Serum Cyréne Alpha Arbutin C Whitening Serum Cyréne Cyrene C+E+Ferulic Acid Serum