Vitamin C Superserum

Protocol

Where to buy Possibly in stock

About this product

The Protocol Vitamin C Superserum is a serums, essence, ampoule. Our analysis of its 15 ingredients (11 low-risk) rates it Excellent (94/100). Based on its ingredients, it looks well-suited to oily / acne-prone and sensitive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
15
Low-risk
11
Fragrance
Fragrance-free
Origin
United States

The evidence

Quick Product Notes

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

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 3/5
Good for dry skin
Caprylyl Glycol Glycerin Polyglyceryl-4 Caprate
Caution for dry skin
Xanthan Gum Glycerin Polyglyceryl-4 Caprate Polysorbate 20 Alcohol Denat.
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Magnesium Ascorbyl Phosphate Alcohol Denat.
Sensitive Skin 6/3
Good for sensitive skin
Magnesium Ascorbyl Phosphate Vanilla Planifolia Fruit Extract Passiflora Incarnata Fruit Extract Glycerin Tetrahexyldecyl Ascorbate Tocopheryl Acetate
Caution for sensitive skin
Glycerin Alcohol Denat. Phenoxyethanol

Ingredients list

15 total
Lower hazard (1) Higher hazard (4)
All15 Skin Conditioning13 Antioxidant4 Solvent3 Hair Conditioning3 Skin Protecting3 Fragrance3 Humectant3 Viscosity Controlling2
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
Hamamelis Virginiana Water
(Astringent, Hair Conditioning, Skin Conditioning, Soothing)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
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
Magnesium Ascorbyl Phosphate
(Antioxidant)
1
Tetrahexyldecyl Ascorbate
(Antioxidant, Skin Conditioning)
4
Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
1
Vanilla Planifolia Fruit Extract
(Skin Conditioning, Skin Protecting, Smoothing)
1
Passiflora Incarnata Fruit Extract
(Skin Conditioning, Skin Protecting)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
B
Polyglyceryl-4 Caprate
(Skin Conditioning, Emollient, Emulsifying, Surfactant)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben

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

Hamamelis Virginiana Water
Astringent, Skin Conditioning
ASCORBIC ACID
Antioxidant, Skin Conditioning
Glycerin
Humectant, Skin Protecting
Magnesium Ascorbyl Phosphate
Antioxidant
Tetrahexyldecyl Ascorbate
Antioxidant, Skin Conditioning
Alcohol Denat.
Astringent

Benefits

Good for oily/acne-prone skin
Good for sensitive skin

Concerns

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

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Hamamelis Virginiana Water
Astringent, Hair conditioning
Limited public safety data.Read moreShow less
EWG N/A AstringentHair conditioningSkin conditioningSoothing
ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Magnesium Ascorbyl Phosphate
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antioxidant
Tetrahexyldecyl Ascorbate
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Vanilla Planifolia Fruit Extract
Skin conditioning, Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioningSkin protectingSmoothing
Passiflora Incarnata Fruit Extract
Skin conditioning, Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioningSkin protecting
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
Caprylyl Glycol
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningEmollientHumectant
Polyglyceryl-4 Caprate
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Skin conditioningEmollientEmulsifyingSurfactant
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
Alcohol Denat.
Antifoaming agent, Antimicrobial
Causes moisture evaporation - prone to dry out skinRead moreShow less
EWG 4 Antifoaming agentAntimicrobialAstringentMaskingSolventViscosity controlling Bad for Dry SkinBad for Sensitive Skin
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
Polysorbate 20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 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.

ASCORBIC ACID, Magnesium Ascorbyl Phosphate, Tetrahexyldecyl Ascorbate

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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