The Ordinary Ethylated Ascorbic Acid 15% Solution Versus First Aid Beauty 10% Vitamin C Brightening Serum
This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and fade the look of dark spots.
This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Colloidal Oatmeal to brighten dull-looking skin and calm redness.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
No concerns
Ingredients Side-by-side
Water
Skin Conditioning3-O-Ethyl Ascorbic Acid
Skin Conditioning
Squalane
Emollient
Sodium Citrate
BufferingTocopheryl Acetate
Antioxidant
Colloidal Oatmeal
Absorbent
Chrysanthemum Parthenium Extract
Skin ConditioningCamellia Sinensis Leaf Extract
Antimicrobial
Glycyrrhiza Glabra Root Extract
Bleaching
Glycerin
Humectant
Polyglyceryl-6 Polyricinoleate
Emulsifying
Xanthan Gum
EmulsifyingPolyglyceryl-10 Dioleate
Emulsifying
Phenoxyethanol
Preservative
Citric Acid
Buffering
Sodium Benzoate
Masking
Potassium Sorbate
Preservative
Sodium Hydroxide
BufferingTetrasodium EDTA
ChelatingWater, 3-O-Ethyl Ascorbic Acid, Squalane, Sodium Citrate, Tocopheryl Acetate, Colloidal Oatmeal, Chrysanthemum Parthenium Extract, Camellia Sinensis Leaf Extract, Glycyrrhiza Glabra Root Extract, Glycerin, Polyglyceryl-6 Polyricinoleate, Xanthan Gum, Polyglyceryl-10 Dioleate, Phenoxyethanol, Citric Acid, Sodium Benzoate, Potassium Sorbate, Sodium Hydroxide, Tetrasodium EDTA
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
3-O-Ethyl Ascorbic Acid is one of the most popular "stable" vitamin C derivatives in skincare.
Plain ascorbic acid is fantastic but notoriously fragile; it browns, oxidizes, and loses potency fast. So attaching an ethyl group to the third carbon of the molecule gives it some cool perks:
In a formula, it does the 3 classic vitamin C jobs: it acts as an antioxidant, helps brighten skin tone by inhibiting tyrosinase, and supports collagen.
The evidence is reasonably solid for a cosmetic ingredient; Liao and colleagues (2018) showed it's significantly more stable than ascorbic acid while still being effective.
A 2021 study by Zerbinati and colleagues tested a serum with 30% 3-O-ethyl-l-ascorbic acid and 1% lactic acid significantly increased collagen production, reduced UVB-induced DNA damage, and decreased melanin on a reconstructed pigmented skin model.
Typical real world usage sits around 0.5-5% (and 1-2% is common for daily serums).
Amounts up to 30% have been shown to be non-irritating on human skin samples, but two isolated cases reported allergic contact dermatitis so a patch test is sensible if you have reactive skin.
Learn more about 3-O-Ethyl Ascorbic Acid
