Red Algae Clarifying Mask

OSEA

Where to buy Possibly in stock

About this product

The OSEA Red Algae Clarifying Mask is a wash-off mask. Our analysis of its 44 ingredients (24 low-risk) rates it Excellent (99/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Wash-Off Mask
Ingredients
44
Low-risk
24
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 4/9
Good for dry skin
Glyceryl Stearate Lavandula Hybrida Oil Glycerin Camellia Sinensis Leaf Extract
Caution for dry skin
Disodium Cocoyl Glutamate Sodium Cocoyl Glutamate Sorbitan Olivate Stearic Acid Illite Xanthan Gum Glycerin Bentonite Camellia Sinensis Leaf Extract
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Magnesium Ascorbyl Phosphate Camellia Sinensis Leaf Extract
Sensitive Skin 3/11
Good for sensitive skin
Magnesium Ascorbyl Phosphate Glycerin Camellia Sinensis Leaf Extract
Caution for sensitive skin
Pelargonium Graveolens Flower Oil Stearic Acid Juniperus Virginiana Oil Glycerin Cupressus Sempervirens Oil Citric Acid Eucalyptus Globulus Leaf Oil Camellia Sinensis Leaf Extract Sodium Benzoate Potassium Sorbate Limonene

Ingredients list

44 total
Lower hazard (1) Higher hazard (6)
All44 Skin Conditioning20 Fragrance17 Perfuming8 Masking7 Tonic6 Emulsion Stabilising5 Hair Conditioning5 Skin Conditioning Emollient4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Sorbitan Olivate
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
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
Carthamus Tinctorius Seed Oil
(Fragrance, Skin Conditioning)
Lactobacillus
(Skin Conditioning)
1
A
Glyceryl Stearate
(Emollient, Emulsifying)
Fungal Acne
Fungal Acne Trigger
1
A
Stearic Acid
(Fragrance, Sufactant, Emulsifying, Surfactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Stearic Acid., Emulsion Stabilising, Masking, Refatting)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
2
A
Bentonite
(Absorbent, Bulking Agent, Emulsion Stabilising, Opacifying, Suspending Agent Nonsurfactant, Viscosity Increasing Agent, Viscosity Controlling)
Sesamum Indicum Seed Oil
(Fragrance, Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient)
Gigartina Stellata/Kappaphycus Alvarezii Extract
(Skin Protecting)
1
Corallina Officinalis Extract
(Skin Conditioning)
Cocos Nucifera Fruit Extract
(Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient)
SIMMONDSIA CHINENSIS SEED OIL
(Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient)
1
Illite
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent)
Pichia/Resveratrol Ferment Extract
(Skin Conditioning)
CHAMOMILLA RECUTITA FLOWER EXTRACT
(Fragrance, Skin Conditioning)
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
A
Magnesium Ascorbyl Phosphate
(Antioxidant)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
B
Disodium Cocoyl Glutamate
(Cleansing, Surfactant)
1
B
Sodium Cocoyl Glutamate
(Cleansing, Surfactant)
Citrus Paradisi Peel Oil
(Fragrance, Perfuming)
Citrus Aurantifolia Oil
(Cleansing, Fragrance, Hair Conditioning, Perfuming, Skin Conditioning, Tonic)
Citrus Nobilis Peel Oil
(Fragrance, Skin Conditioning, Tonic)
2
Cupressus Sempervirens Oil
(Masking)
2
Eucalyptus Globulus Leaf Oil
(Perfuming, Skin Conditioning)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
Juniperus Virginiana Oil
(Masking, Tonic)
lavandula angustifolia oil
(Fragrance, Tonic)
1
Lavandula Hybrida Oil
(Emollient)
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
Mentha Piperita Oil
(Fragrance, Perfuming, Refreshing, Tonic)
Mentha Viridis Extract
(Fragrance, Oral Care)
1
Pelargonium Graveolens Flower Oil
(Masking)
Prunus Amygdalus Dulcis Oil
(Skin Conditioning)
Rosmarinus Officinalis Leaf Oil
(Fragrance, Skin Conditioning)
Thymus Vulgaris Oil
(Fragrance, Perfuming)
Glycine Soja Oil
(Perfuming, Skin Conditioning, Skin Conditioning Emollient)
1
Sodium Levulinate
(Skin Conditioning)
1
Sodium Anisate
(Antimicrobial, Flavoring Agent)
1
Leuconostoc/Radish Root Ferment Filtrate
(Antidandruff Agent, Antimicrobial)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
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

Glycerin
Humectant, Skin Protecting
Carthamus Tinctorius Seed Oil
Skin Conditioning
Lactobacillus
Skin Conditioning
Glyceryl Stearate
Emollient
Sesamum Indicum Seed Oil
Skin Conditioning
Gigartina Stellata/Kappaphycus Alvarezii Extract
Skin Protecting

Benefits

Good for oily/acne-prone skin

Concerns

Contains eu allergen
Not fungal acne (malassezia) safe
May not suit dry skin
May not suit sensitive skin

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Carthamus Tinctorius Seed Oil
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
Lactobacillus
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Bentonite
Absorbent, Bulking agent
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A AbsorbentBulking agentEmulsion stabilisingOpacifyingSuspending agent -nonsurfactantViscosity increasing agentViscosity controlling
Sesamum Indicum Seed Oil
Fragrance, Hair conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceHair conditioningSkin conditioningSkin conditioning emollient
Gigartina Stellata/Kappaphycus Alvarezii Extract
Skin protecting
Limited public safety data.Read moreShow less
EWG N/A Skin protecting
Corallina Officinalis Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Cocos Nucifera Fruit Extract
Hair conditioning, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningSkin conditioningSkin conditioning emollient
SIMMONDSIA CHINENSIS SEED OIL
Hair conditioning, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningSkin conditioningSkin conditioning emollient
Illite
Abrasive, Absorbent
Low-hazard ingredient.Read moreShow less
EWG 1 AbrasiveAbsorbentAnticaking agentBulking agent
Pichia/Resveratrol Ferment Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
CHAMOMILLA RECUTITA FLOWER EXTRACT
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
Magnesium Ascorbyl Phosphate
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antioxidant
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Disodium Cocoyl Glutamate
Cleansing, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B CleansingSurfactant
+ 21 more — see the full ingredients list above
Sorbitan Olivate
Emulsifying, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmulsifyingSurfactant 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
Glyceryl Stearate
Emollient, Emulsifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientEmulsifying Fungal-acne trigger
Stearic Acid
Fragrance, Sufactant
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceSufactantEmulsifyingSurfactantsurfactant-cleansing agent is included as a function for the soap form of stearic acid.Emulsion stabilisingMaskingRefatting Bad for Oily 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
Eucalyptus Globulus Leaf Oil
Perfuming, Skin conditioning
Strong essential oil which can irritate skinRead moreShow less
EWG 2 PerfumingSkin conditioning Bad for Sensitive Skin
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
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: Use as the first step, on clean hands, before the rest of your routine.
  • 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.

Magnesium Ascorbyl Phosphate

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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