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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

Rohto Melano CC Brightening Lotion Rohto Mentholatum Melano CC Concentration Measures Toner Avoskin Intensive Divine Day Cream Avoskin Luminous Emulsion Night Cream Be Minimalist Vitamin C (Ethyl Ascorbic Acid) 10% + Acetyl Glucosamine 1% Bielenda Dr Medica Capillaries Dermatological Face Serum Reducing Skin Redness Day Night Biopelle Tensage Antioxidant Defense Serum Conscious Chemist Vivid C Pro Collagen Serum Derma Essentia Vitamin C Serum Dermadoctor Kakadu C Serum ElsheSkin Vitamin C Serum Erha Truwhite Activator C Serum Face Theory Regena C 30% Vitamin C Serum C30 Hylamide Booster;C25 Hyper Skin Hyper Clear Brightening Clearing Vitamin C Serum LANEIGE Radian-C Cream Matra Vitamin C Serum Medik8 Super C30 Medik8 Super C30 + Intense Medik8 White Balance Brightening Serum Neemli Naturals Hyaluronic & Vitamin C Serum Ole Henriksen Banana Bright Vitamin C Serum Puca Pure & Care Vitamin C Serum Pulp Day After Binge Purid Refreshing Brightening Serum Quem Disse Berenice Skin.Q Sérum Concentrado Antioxidante Vitamina C Rodial Vit C Brightening Mask Ruruberry Ethyl 5% Ascorbic Acid St. Botanica Vitamin C20% E & Hyaluronic Acid Professional Facial Serum Superdrug Vitamin C 10% Facial Booster The derma CO 20% Vitamin C Serum Volition Daily Vitamin Glow Booster Wildleaf Vitamin C Serum Wildleaf Vitamin C Serum facetheory Regena C30 Vitamin C Serum zilch Afterglow Vitamin C Serum 2Sol Facial Recovery Booster Allies of Skin 20% Vitamin C Brighten And Firm Serum Allies of Skin 20% Vitamin C Brighten And Firm Serum Alpha-H Vitamin C Serum Avoskin Perfect Hydrating Treatment Essence Avoskin Perfect Hydrating Treatment Essence Babaria Serum Vitamina C Beyer&Söhne Hautgel+ Anti-Aging Bielenda professional Vit-C Activ Bionike Defence Boost Antioxidant Concentrate Bliss Bright Idea Serum CGG Cosmetics Hyaluronic Acid 2.5%- Vitamin C- E Facial Serum DMK Super Serum Dr. Dennis Gross Skincare C + Collagen Brighten & Firm Vitamin C Serum