Hydrating Scalp Serum for Healthy, Fuller Looking Hair

Ouai

Hydrating Scalp Serum for Healthy, Fuller Looking Hair

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About this product

The Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair is a misc. Our analysis of its 28 ingredients (16 low-risk) rates it Excellent (92/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Misc
Ingredients
28
Low-risk
16
Fragrance
Contains fragrance
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 4/5
Good for dry skin
Butylene Glycol Sodium Hyaluronate Glycerin Selaginella Lepidophylla Extract
Caution for dry skin
Rosa Centifolia Flower Extract Glycerin Sodium Hydroxide Polysorbate 20 Eugenol
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Rosa Centifolia Flower Extract
Sensitive Skin 3/9
Good for sensitive skin
Acetyl Tetrapeptide-3 Glycerin Tocopheryl Acetate
Caution for sensitive skin
Rosa Centifolia Flower Extract Butylene Glycol Glycerin Citric Acid Sodium Benzoate Phenoxyethanol Linalool Limonene Eugenol

Ingredients list

28 total
Lower hazard (1) Higher hazard (7)
All28 Skin Conditioning13 Fragrance10 Masking6 Solvent4 Humectant4 Viscosity Controlling4 Deodorant3 Film Forming3
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
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
A
Polyquaternium-7
(Antistatic Agent, Film Forming, Hair Fixing)
Rhodiola Rosea Extract
(Skin Conditioning Emollient)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
1
Acetyl Tetrapeptide-3
(Skin Protecting)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
Rosa Centifolia Flower Extract
(Astringent, Masking, Skin Conditioning, Tonic)
1
A
Dextran
(Binding Agent, Bulking Agent, Binding, Viscosity Controlling)
Trifolium Pratense Flower Extract
(Astringent, Fragrance)
ACANTHOPANAX SENTICOSUS ROOT EXTRACT
(Skin Conditioning, Soothing)
Rhaponticum Carthamoides Root Extract
(Skin Conditioning)
Inonotus Obliquus Extract
(Skin Conditioning)
Selaginella Lepidophylla Extract
(Emollient)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
1
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
(Emulsion Stabilising, Film Forming, Viscosity Controlling)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
PARFUM
(Fragrance, Perfuming)
7
Eugenol
(Denaturant, Fragrance, Masking, Tonic)
Allergens
Allergens
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens

My Ingredient Notes

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Key ingredients

Butylene Glycol
Skin Conditioning, Humectant
Glycerin
Humectant, Skin Protecting
Sodium Hyaluronate
Skin Conditioning, Humectant
Tocopheryl Acetate
Antioxidant, Skin Conditioning
Acetyl Tetrapeptide-3
Skin Protecting
TOCOPHEROL
Antioxidant, Skin Conditioning

Benefits

Good for oily/acne-prone skin

Concerns

Contains paraben
Contains eu allergen
Not fungal acne (malassezia) safe
Eugenol — higher EWG
May not suit dry skin
May not suit sensitive skin

EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Polyquaternium-7
Antistatic agent, Film forming
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antistatic agentFilm formingHair fixing
Rhodiola Rosea Extract
Skin conditioning emollient
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning emollient
Acetyl Tetrapeptide-3
Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin protecting
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Rosa Centifolia Flower Extract
Astringent, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 AstringentMaskingSkin conditioningTonic
Dextran
Binding agent, Bulking agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentBulking agentBindingViscosity controlling
Trifolium Pratense Flower Extract
Astringent, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AstringentFragrance
ACANTHOPANAX SENTICOSUS ROOT EXTRACT
Skin conditioning, Soothing
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningSoothing
Rhaponticum Carthamoides Root Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Inonotus Obliquus Extract
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Selaginella Lepidophylla Extract
Emollient
Limited public safety data.Read moreShow less
EWG N/A Emollient
Ethylhexylglycerin
Deodorant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A DeodorantSkin conditioning
Disodium EDTA
Chelating agent, Viscosity controlling
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Chelating agentViscosity controlling
Sodium Hydroxide
Denaturant, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantPh adjusterBuffering agent
+ 3 more — see the full ingredients list above
Polysorbate 20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
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
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
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
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Eugenol
Denaturant, Fragrance
Higher-hazard ingredient.Read moreShow less
EWG 7 DenaturantFragranceMaskingTonic Allergens
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking Allergens

How to use

How to use

  • 1 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.

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