MEGA-C™ 30% Vitamin C Brightening Mask

Kate Somerville

MEGA-C™ 30% Vitamin C Brightening Mask

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About this product

The Kate Somerville MEGA-C™ 30% Vitamin C Brightening Mask is a wash-off mask. Our analysis of its 25 ingredients (10 low-risk) rates it Excellent (98/100). 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
Wash-Off Mask
Ingredients
25
Low-risk
10
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

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 4/1
Good for dry skin
Caprylic/Capric Triglyceride Polyglyceryl-3 Diisostearate Astragalus Membranaceus Root Extract Dimethicone
Caution for dry skin
Polyglyceryl-3 Diisostearate
Oily/Acne-Prone Skin No data
Sensitive Skin 3/3
Good for sensitive skin
Ubiquinone Dimethicone Hippophae Rhamnoides Fruit Oil
Caution for sensitive skin
Caprylic/Capric Triglyceride Limonene Pogostemon Cablin Leaf Oil

Ingredients list

25 total
Lower hazard (1) Higher hazard (6)
All25 Skin Conditioning22 Fragrance7 Skin Protecting4 Emollient4 Perfuming4 Hair Conditioning3 Antioxidant2 Antimicrobial2
EWG CIR Ingredient Name & Cosmetic Functions Notes
3
A
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning)
Silicone
Silicone
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
1
Polysilicone-11
(Film Forming)
3
A
PEG-10 Dimethicone
(Hair Conditioning, Skin Conditioning)
A
Hippophae Rhamnoides Fruit Oil
(Skin Protecting)
Divinyldimethicone/Dimethicone/Phenylsilsesquioxane Crosspolymer
(Anticaking, Opacifying, Viscosity Controlling)
Carthamus Tinctorius Seed Oil
(Fragrance, Skin Conditioning)
BRASSICA CAMPESTRIS SEED OIL
(Skin Conditioning)
Bisabolol
(Fragrance, Skin Conditioning, Soothing)
glycyrrhiza glabra root extract
(Bleaching, Perfuming, Skin Conditioning, Skin Conditioning Emollient, Smoothing, Soothing)
citrus aurantium dulcis peel oil
(Fragrance, Skin Conditioning)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
MENTHA VIRIDIS LEAF OIL
(Astringent, Fragrance, Skin Conditioning)
Pogostemon Cablin Leaf Oil
(Masking)
Zingiber Officinale Root Extract
(Fragrance, Perfuming, Skin Conditioning, Tonic)
1
Ceramide NP
(Hair Conditioning, Skin Conditioning)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
1
B
Polyglyceryl-3 Diisostearate
(Skin Conditioning, Emollient, Emulsifying, Surfactant)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
1
Ubiquinone
(Antioxidant, Skin Conditioning)
1
Astragalus Membranaceus Root Extract
(Emollient, Skin Conditioning)
Spilanthes Acmella Flower/Leaf/Stem Extract
(Antimicrobial)
1
Althaea Officinalis Root Extract
(Skin Conditioning)
Oryza Sativa Bran Extract
(Skin Conditioning, Skin Protecting)
rosmarinus officinalis leaf extract
(Antimicrobial, Fragrance, Skin Conditioning)
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens

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 C
Brightens, evens tone, and supports collagen.
Niacinamide
Strengthens, smooths, and brightens skin.
Ceramides
Locks in moisture and supports skin barrier.

Benefits

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

Concerns

Contains silicone
Contains eu allergen
Not fungal acne (malassezia) safe

Ingredients explained

ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Polysilicone-11
Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 Film forming
PEG-10 Dimethicone
Hair conditioning, Skin conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Hair conditioningSkin conditioning
Hippophae Rhamnoides Fruit Oil
Skin protecting
Limited public safety data.Read moreShow less
EWG N/A CIR A Skin protecting
Divinyldimethicone/Dimethicone/Phenylsilsesquioxane Crosspolymer
Anticaking, Opacifying
Limited public safety data.Read moreShow less
EWG N/A AnticakingOpacifyingViscosity controlling
Carthamus Tinctorius Seed Oil
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
BRASSICA CAMPESTRIS SEED OIL
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Bisabolol
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioningSoothing
glycyrrhiza glabra root extract
Bleaching, Perfuming
Limited public safety data.Read moreShow less
EWG N/A BleachingPerfumingSkin conditioningSkin conditioning emollientSmoothingSoothing
citrus aurantium dulcis peel oil
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
MENTHA VIRIDIS LEAF OIL
Astringent, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AstringentFragranceSkin conditioning
Pogostemon Cablin Leaf Oil
Masking
Limited public safety data.Read moreShow less
EWG N/A Masking
Zingiber Officinale Root Extract
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfumingSkin conditioningTonic
Ceramide NP
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningSkin conditioning
+ 7 more — see the full ingredients list above
Dimethicone
Antifoaming agent, Skin protecting
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antifoaming agentSkin protectingEmollientSkin conditioning Silicone
Polyglyceryl-3 Diisostearate
Skin conditioning, Emollient
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR B Skin conditioningEmollientEmulsifyingSurfactant Bad for Oily SkinFungal-acne trigger
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens

How to use

How to use

  • 1 Where it fits: Use as the first step, on clean hands, before the rest of your routine.
  • 2 Morning & evening: Suitable for both AM and PM use.

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

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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