Pure Vitamin C Serum
The Skin401 Pure Vitamin C Serum is a serums, essence, ampoule. Our analysis of its 37 ingredients (30 low-risk) rates it Excellent (96/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.
The Skin401 Pure Vitamin C Serum is a serums, essence, ampoule. Our analysis of its 37 ingredients (30 low-risk) rates it Excellent (96/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Water
(Solvent) |
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3-O-ETHYL ASCORBIC ACID
(Skin Conditioning) |
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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling) |
Good for Dry Skin
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Pentylene Glycol
(Skin Conditioning, Solvent) |
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glycyrrhiza glabra root extract
(Bleaching, Perfuming, Skin Conditioning, Skin Conditioning Emollient, Smoothing, Soothing) |
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Aloe Barbadensis Leaf Juice
(Skin Conditioning) |
Good for Sensitive Skin
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Resveratrol
(Antioxidant, Skin Protecting) |
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Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning) |
Good for Dry Skin
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Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning) |
Good for Dry Skin
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Valine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Proline
(Fragrance, Hair Conditioning, Skin Conditioning) |
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Threonine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Hair Waving Or Straightening) |
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Sodium Lactate
(Buffering Agent, Exfoliant, Humectant, Keratolytic) |
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Arginine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Aspartic Acid
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Isoleucine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent) |
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Histidine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Humectant) |
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Phenylalanine
(Fragrance, Hair Conditioning, Skin Conditioning) |
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Glycine
(Buffering Agent, Fragrance, Hair Conditioning, Skin Conditioning Agent Miscellaneous, Antistatic Agent, Skin Conditioning) |
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Alanine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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PCA
(Humectant, Moisturising) |
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Serine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient) |
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Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling) |
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
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Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
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Lactic Acid
(Exfoliant, Fragrance, Humectant, Ph Adjuster, Skin Conditioning Agent Humectant, Skin Conditioning, Buffering Agent) |
Bad for Sensitive Skin
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Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling) |
Bad for Dry Skin
Bad for Sensitive Skin
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Carnitine Tartrate | |
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Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking) |
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Polysorbate 20
(Emulsifying, Surfactant) |
Fungal Acne Trigger
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking) |
Bad for Sensitive Skin
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Potassium Sorbate
(Fragrance, Preservative) |
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Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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Tetrasodium EDTA
(Chelating Agent) |
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How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
The concentrations these actives are typically effective at in research — not a measurement of this product.
L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.
3-O-ETHYL ASCORBIC ACID
Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.
Niacinamide
OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.
Lactic Acid
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
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