C-Shield Rapid Refining Antioxidant Serum

Cipher Skincare

Where to buy Possibly in stock

About this product

The Cipher Skincare C-Shield Rapid Refining Antioxidant Serum is a serums, essence, ampoule. Our analysis of its 43 ingredients (35 low-risk) rates it Excellent (97/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Serums, Essence, Ampoules
Ingredients
43
Low-risk
35
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 15/3
Good for dry skin
Glycereth-26 Diheptyl Succinate Anhydroxylitol Betaine Ascorbyl Tetraisopalmitate Ethyl Oleate Ectoin Olive Glycerides Undecane Xylitol Xylitylglucoside Caprylic/Capric Triglyceride Glycerin Sodium Lactate Lactic Acid
Caution for dry skin
Glyceryl Oleate Citrate Glycerin Polyglyceryl-10 Laurate
Oily/Acne-Prone Skin No data
Sensitive Skin 9/9
Good for sensitive skin
Madecassoside Superoxide Dismutase Ascorbyl Tetraisopalmitate Capryloyl Glycerin/Sebacic Acid Copolymer Glycerin Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate Propyl Gallate Sodium Metabisulfite 4-Butylresorcinol
Caution for sensitive skin
Ethyl Oleate Caprylic/Capric Triglyceride Glycerin Tridecane Hydroxypropyl Cyclodextrin Citric Acid Propyl Gallate Lactic Acid Phenoxyethanol

Ingredients list

43 total
Lower hazard (1) Higher hazard (4)
All43 Skin Conditioning33 Humectant12 Antioxidant9 Fragrance8 Emollient6 Viscosity Controlling6 Perfuming5 Hair Conditioning5
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
1
Ascorbyl Tetraisopalmitate
(Antioxidant, Skin Conditioning, Emollient)
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
Glycereth-26
(Humectant, Viscosity Decreasing Agent, Solvent, Viscosity Controlling)
1
Glyceryl Oleate Citrate
(Emulsifying, Surfactant)
1
Ethyl Oleate
(Fragrance, Hair Conditioning, Skin Conditioning, Emollient, Perfuming)
Fungal Acne
Fungal Acne Trigger
1
Undecane
(Emollient, 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
Methyl Methacrylate/Glycol Dimethacrylate Crosspolymer
(Film Forming)
3
B
Sodium Lactate
(Buffering Agent, Exfoliant, Humectant, Keratolytic)
4-Butylresorcinol
(Antioxidant)
1
Ectoin
(Buffering Agent, Skin Conditioning, Emollient)
Diglucosyl Gallic Acid
(Hair Conditioning)
1
Oryzanol
(Skin Conditioning, Antistatic Agent)
1
Xylitylglucoside
(Humectant, Skin Conditioning)
1
Superoxide Dismutase
(Reducing, Skin Conditioning, Antioxidant)
1
Palmitoyl Tripeptide-38
(Skin Conditioning)
Tremella Fuciformis Polysaccharide
(Emulsion Stabilising, Film Forming, Skin Conditioning)
1
Madecassoside
(Antioxidant, Skin Conditioning)
1
Plankton Extract
(Skin Conditioning)
1
B
Betaine
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning, Viscosity Controlling)
1
Diheptyl Succinate
(Emollient, Skin Conditioning)
1
Anhydroxylitol
(Humectant, Skin Conditioning)
1
Hydroxypropyl Starch Phosphate
(Bulking Agent, Viscosity Increasing Agent, Viscosity Controlling)
1
Olive Glycerides
(Emulsifying, Humectant)
1
Tridecane
(Perfuming)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
Xylitol
(Flavoring Agent, Humectant, Skin Conditioning)
1
Polyacrylate Crosspolymer-6
(Emulsion Stabilising, Viscosity Controlling)
1
B
Polyglyceryl-10 Laurate
(Skin Conditioning, Emulsifying, Surfactant)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
1
Capryloyl Glycerin/Sebacic Acid Copolymer
(Film Forming, Hair Conditioning, Skin Conditioning, Skin Protecting)
1
A
Hydroxypropyl Cyclodextrin
(Chelating Agent, Emulsion Stabilising, Masking, Skin Conditioning)
3
B
Propyl Gallate
(Antioxidant, Fragrance, Perfuming)
4
B
Lactic Acid
(Exfoliant, Fragrance, Humectant, Ph Adjuster, Skin Conditioning Agent Humectant, Skin Conditioning, Buffering Agent)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
A
Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate
(Antioxidant)
4
A
Sodium Metabisulfite
(Antioxidant, Preservative, Reducing)
1
A
Sodium Gluconate
(Chelating Agent, Skin Conditioning)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin

My Ingredient Notes

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

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No close formula match yet — browse other products like this

Key ingredients

Antioxidants
Shields skin from free radical damage.
Vitamin C
Brightens, evens tone, and supports collagen.
Vitamin E
Protects skin and soothes irritation.
Peptides
Supports skin hydration and improves firmness.
Rucinol
Advanced brightening agent for dark spots.
Ectoin
Protects against environmental stress and aging.
Show all 6 key ingredients

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Barrier RepairStrengthen and restore your skin's natural barrier.
Anti-AgingSoftens lines and helps skin look youthful.
Redness ReducingSoothes visible redness and calms irritation.
BrighteningRestores radiance to dull, tired skin.
Scar HealingImproves the look of marks and scars.
Dark SpotsFades dark spots for even skin tone.
Reduces IrritationEases discomfort and supports skin resilience.

Concerns

Contains paraben
Not fungal acne (malassezia) safe

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Ascorbyl Tetraisopalmitate
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioningEmollient
Propanediol
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
Glycereth-26
Humectant, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantViscosity decreasing agentSolventViscosity controlling
Glyceryl Oleate Citrate
Emulsifying, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 EmulsifyingSurfactant
Undecane
Emollient, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 EmollientSkin conditioning
Methyl Methacrylate/Glycol Dimethacrylate Crosspolymer
Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Film forming
Sodium Lactate
Buffering agent, Exfoliant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Buffering agentExfoliantHumectantKeratolytic
4-Butylresorcinol
Antioxidant
Limited public safety data.Read moreShow less
EWG N/A Antioxidant
Ectoin
Buffering agent, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Buffering agentSkin conditioningEmollient
Diglucosyl Gallic Acid
Hair conditioning
Limited public safety data.Read moreShow less
EWG N/A Hair conditioning
Oryzanol
Skin conditioning, Antistatic agent
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioningAntistatic agent
Xylitylglucoside
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSkin conditioning
Superoxide Dismutase
Reducing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 ReducingSkin conditioningAntioxidant
+ 23 more — see the full ingredients list above
Ethyl Oleate
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceHair conditioningSkin conditioningEmollientPerfuming Fungal-acne trigger
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
Lactic Acid
Exfoliant, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B ExfoliantFragranceHumectantPh adjusterSkin-conditioning agent -humectantSkin conditioningBuffering agent Bad for Sensitive Skin
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Citric Acid
Chelating agent, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 2 CIR A Chelating agentFragrancePh adjusterBuffering agentMasking Bad for Sensitive Skin

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 3 Wear SPF the next day: Acids and retinoids increase sun sensitivity — daily sunscreen is a must while using this.

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, Ascorbyl Tetraisopalmitate

AHA (acid exfoliant) 5–10% (OTC)

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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