C-Radical Defense Antioxidant Serum

Alastin

Where to buy Possibly in stock

About this product

The Alastin C-Radical Defense Antioxidant Serum is a serums, essence, ampoule. Our analysis of its 39 ingredients (32 low-risk) rates it Excellent (99/100). Based on its ingredients, it looks well-suited to oily / acne-prone, 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
39
Low-risk
32
Fragrance
Fragrance-free
Origin
United States
Data updated
May 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 12/8
Good for dry skin
C12-15 Alkyl Benzoate Mannitol Betaine Cetyl Alcohol Squalane Ectoin Caprylic/Capric Triglyceride Caprylyl Glycol Glycerin Tremella Fuciformis Sporocarp Extract Camellia Sinensis Leaf Extract Lecithin
Caution for dry skin
Centella Asiatica Extract Cetyl Alcohol Xanthan Gum Glycerin Phosphatidylcholine Polyglyceryl-10 Laurate Camellia Sinensis Leaf Extract Lecithin
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Camellia Sinensis Leaf Extract
Sensitive Skin 9/9
Good for sensitive skin
Centella Asiatica Extract Sodium Ascorbate Ergothioneine Ubiquinone Glycerin Tremella Fuciformis Sporocarp Extract Physalis Angulata Extract Camellia Sinensis Leaf Extract Tocopheryl Acetate
Caution for sensitive skin
Mannitol Cetyl Alcohol Caprylic/Capric Triglyceride Glycerin Citric Acid Camellia Sinensis Leaf Extract Sodium Benzoate Potassium Sorbate Phenoxyethanol

Ingredients list

39 total
Lower hazard (1) Higher hazard (4)
All39 Skin Conditioning37 Fragrance10 Humectant9 Emollient8 Antioxidant7 Masking6 Hair Conditioning6 Viscosity Controlling5
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, 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
3
B
Sodium Acrylates Copolymer
(Binding Agent, Film Forming, Viscosity Increasing Agent, Binding, Opacifying, Viscosity Controlling)
1
A
Squalane
(Emollient, Hair Conditioning, Refatting, Skin Conditioning)
1
A
Sodium Ascorbate
(Antioxidant)
1
Ubiquinone
(Antioxidant, Skin Conditioning)
1
Ectoin
(Buffering Agent, Skin Conditioning, Emollient)
1
Physalis Angulata Extract
(Skin Protecting)
1
B
Betaine
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning, Viscosity Controlling)
1
A
Phosphatidylcholine
(Skin Conditioning, Emulsifying, Surfactant)
1
B
Camellia Sinensis Leaf Extract
(Antimicrobial, Antioxidant, Astringent, Emollient, Humectant, Masking, Oral Care Agent, Skin Conditioning, Skin Protecting, Tonic, Uv Absorber)
Good for Oily Skin
Good for Oily Skin
1
Carnosine
(Skin Conditioning)
1
B
Centella Asiatica Extract
(Cleansing, Skin Conditioning, Smoothing, Soothing, Tonic)
olea europaea leaf extract
(Perfuming, Skin Conditioning)
Zingiber Officinale Root Extract
(Fragrance, Perfuming, Skin Conditioning, Tonic)
1
Ergothioneine
(Antioxidant)
1
Dunaliella Salina Extract
(Skin Conditioning)
Punica Granatum Fruit Extract
(Skin Conditioning)
Bisabolol
(Fragrance, Skin Conditioning, Soothing)
1
Lactoferrin
(Hair Conditioning, Skin Conditioning)
1
Tremella Fuciformis Sporocarp Extract
(Antioxidant, Hair Conditioning, Humectant, Skin Conditioning)
1
B
Polyglyceryl-10 Laurate
(Skin Conditioning, Emulsifying, Surfactant)
1
A
Cetyl Alcohol
(Emulsion Stabilising, Fragrance, Opacifying, Emulsifying, Surfactant, Foam Boosting, Viscosity Increasing Agent, Emollient, Masking, Viscosity Controlling)
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
Helianthus Annuus Seed Oil
(Fragrance, Skin Conditioning, Skin Conditioning Emollient)
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
Mannitol
(Binding Agent, Flavoring Agent, Humectant, Binding, Masking, Moisturising, Skin Conditioning)
2
3
Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
1
A
C12-15 Alkyl Benzoate
(Skin Conditioning, Emollient, Antimicrobial)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
Caprylhydroxamic Acid
(Chelating Agent)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
3
A
Potassium Sorbate
(Fragrance, Preservative)

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

Antioxidants
Shields skin from free radical damage.
Vitamin E
Protects skin and soothes irritation.
Vitamin C
Brightens, evens tone, and supports collagen.
Ectoin
Protects against environmental stress and aging.

Benefits

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

Concerns

Contains paraben
Not fungal acne (malassezia) safe

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Caprylic/Capric Triglyceride
Emollient, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMaskingPerfumingSkin conditioningSolvent
Sodium Acrylates Copolymer
Binding agent, Film forming
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Binding agentFilm formingViscosity increasing agentBindingOpacifyingViscosity controlling
Squalane
Emollient, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientHair conditioningRefattingSkin conditioning
Sodium Ascorbate
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antioxidant
Ubiquinone
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Ectoin
Buffering agent, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Buffering agentSkin conditioningEmollient
Physalis Angulata Extract
Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin protecting
Betaine
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantAntistatic agentSkin conditioningViscosity controlling
Phosphatidylcholine
Skin conditioning, Emulsifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningEmulsifyingSurfactant
Carnosine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Centella Asiatica Extract
Cleansing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B CleansingSkin conditioningSmoothingSoothingTonic
olea europaea leaf extract
Perfuming, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A PerfumingSkin conditioning
Zingiber Officinale Root Extract
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfumingSkin conditioningTonic
Ergothioneine
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 Antioxidant
+ 19 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
Camellia Sinensis Leaf Extract
Antimicrobial, Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B AntimicrobialAntioxidantAstringentEmollientHumectantMaskingOral care agentSkin conditioningSkin protectingTonicUv absorber Good for Oily Skin
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily 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 Morning only: Apply as the last step of your AM routine, after moisturiser, and reapply every ~2 hours of sun exposure.

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.

Sodium 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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