Vitamin C Serum

Cetaphil

Where to buy Possibly in stock

About this product

The Cetaphil Vitamin C Serum is a emulsion. Our analysis of its 22 ingredients (17 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to dry skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Emulsion
Ingredients
22
Low-risk
17
Fragrance
Fragrance-free
Origin
United States
Data updated
Jun 2026

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 7/3
Good for dry skin
Anhydroxylitol Undecane Xylitol Xylitylglucoside Glycerin Hydrolyzed Hyaluronic Acid Dimethicone
Caution for dry skin
Xanthan Gum Glycerin Sodium Hydroxide
Oily/Acne-Prone Skin No data
Sensitive Skin 2/3
Good for sensitive skin
Glycerin Dimethicone
Caution for sensitive skin
Glycerin Tridecane Phenoxyethanol

Ingredients list

22 total
Lower hazard (1) Higher hazard (4)
All22 Skin Conditioning13 Humectant7 Emulsion Stabilising4 Fragrance4 Hair Conditioning3 Skin Protecting3 Viscosity Controlling3 Bulking Agent2
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
2
A
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent)
Good for Dry Skin
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
3
A
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning)
Silicone
Silicone
Acetyl Glycyl Beta-Alanine
(Skin Conditioning)
3-O-ETHYL ASCORBIC ACID
(Skin Conditioning)
1
Pancratium Maritimum Extract
(Bleaching)
1
Hydrolyzed Hyaluronic Acid
(Hair Conditioning, Humectant, Skin Conditioning)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
Xylitylglucoside
(Humectant, Skin Conditioning)
1
Anhydroxylitol
(Humectant, Skin Conditioning)
1
Xylitol
(Flavoring Agent, Humectant, Skin Conditioning)
1
Sodium Polyacryloyldimethyl Taurate
(Emulsion Stabilising, Viscosity Increasing Agent, Viscosity Controlling)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
1
Undecane
(Emollient, Skin Conditioning)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
1
Tridecane
(Perfuming)
1
A
Calcium Aluminum Borosilicate
(Bulking Agent)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
2
A
Tin Oxide
(Abrasive, Bulking Agent, Opacifying, Viscosity Controlling)
1
3
Titanium/Titanium Dioxide
(Cosmetic Colorant, Opacifying)
Helianthus Annuus Seed Oil
(Fragrance, Skin Conditioning, Skin Conditioning Emollient)

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

Glycerin
Humectant, Skin Protecting
Niacinamide
Skin Conditioning
Dimethicone
Skin Protecting, Emollient
Acetyl Glycyl Beta-Alanine
Skin Conditioning
3-O-ETHYL ASCORBIC ACID
Skin Conditioning
Hydrolyzed Hyaluronic Acid
Humectant, Skin Conditioning

Benefits

Good for dry skin

Concerns

Contains paraben
Contains silicone
Not fungal acne (malassezia) safe
May not suit sensitive skin

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Acetyl Glycyl Beta-Alanine
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
3-O-ETHYL ASCORBIC ACID
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Pancratium Maritimum Extract
Bleaching
Low-hazard ingredient.Read moreShow less
EWG 1 Bleaching
Hydrolyzed Hyaluronic Acid
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningHumectantSkin conditioning
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Xylitylglucoside
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSkin conditioning
Anhydroxylitol
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSkin conditioning
Xylitol
Flavoring agent, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 Flavoring agentHumectantSkin conditioning
Sodium Polyacryloyldimethyl Taurate
Emulsion stabilising, Viscosity increasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 Emulsion stabilisingViscosity increasing agentViscosity controlling
Undecane
Emollient, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 EmollientSkin conditioning
Xanthan Gum
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingSkin conditioningSurfactant -emulsifying agentViscosity increasing agentBindingGel formingViscosity controlling
Tridecane
Perfuming
Low-hazard ingredient.Read moreShow less
EWG 1 Perfuming
Calcium Aluminum Borosilicate
Bulking agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Bulking agent
+ 4 more — see the full ingredients list above
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Dimethicone
Antifoaming agent, Skin protecting
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antifoaming agentSkin protectingEmollientSkin conditioning Silicone
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben

How to use

How to use

  • 1 Morning works well: Antioxidants like vitamin C pair well with daytime use under sunscreen.

General guidance from this product's category and active ingredients — always follow the directions on the package.

Trust & honesty

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

Vitamin C (ascorbic) 5–20%

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

Niacinamide 2–5% (up to 10%)

Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.

Niacinamide

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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