Nº.9 Bond Protector Nourishing Hair Serum

Olaplex

Nº.9 Bond Protector Nourishing Hair Serum

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About this product

The Olaplex Nº.9 Bond Protector Nourishing Hair Serum is a misc. Our analysis of its 31 ingredients (22 low-risk) rates it Excellent (90/100). Based on its ingredients, it looks well-suited to dry 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
31
Low-risk
22
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 6/3
Good for dry skin
Maltitol Anhydroxylitol Betaine Xylitol Xylitylglucoside Sodium Hyaluronate
Caution for dry skin
PVP Cetrimonium Chloride Sodium Hydroxide
Oily/Acne-Prone Skin No data
Sensitive Skin 1/10
Good for sensitive skin
Pelvetia Canaliculata Extract
Caution for sensitive skin
Maltitol Citric Acid Sodium Benzoate Sorbic Acid Phenoxyethanol Linalool Citronellol Hexyl Cinnamal Limonene Citral

Ingredients list

31 total
Lower hazard (1) Higher hazard (7)
All31 Skin Conditioning13 Humectant9 Film Forming9 Fragrance9 Antistatic Agent7 Masking7 Hair Conditioning6 Viscosity Controlling5
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
B
Betaine
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning, Viscosity Controlling)
1
A
Quaternium-22
(Antistatic Agent, Film Forming, Hair Conditioning)
Bis-Aminopropyl Diglycol Dimaleate
(Hair Conditioning, Hair Waving Or Straightening, Skin Conditioning)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
3
B
Cetrimonium Chloride
(Antistatic Agent, Cosmetic Biocide, Emulsifying, Surfactant, Antimicrobial, Preservative)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
1
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
1
A
PVP
(Binding Agent, Emulsion Stabilising, Film Forming, Hair Fixing, Suspending Agent Nonsurfactant, Antistatic Agent, Binding, Viscosity Controlling)
1
A
Guar Hydroxypropyltrimonium Chloride
(Antistatic Agent, Hair Conditioning, Viscosity Increasing Agent, Film Forming, Skin Conditioning, Viscosity Controlling)
FURCELLARIA LUMBRICALIS EXTRACT
(Skin Conditioning)
1
Pelvetia Canaliculata Extract
(Skin Protecting)
1
Xylitylglucoside
(Humectant, Skin Conditioning)
1
Polyquaternium-44
(Antistatic Agent, Film Forming, Hair Conditioning)
1
Anhydroxylitol
(Humectant, Skin Conditioning)
1
A
Maltitol
(Flavoring Agent, Humectant, Masking, Moisturising, Skin Conditioning)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
Trisodium Ethylenediamine Disuccinate
(Chelating Agent)
1
Xylitol
(Flavoring Agent, Humectant, Skin Conditioning)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
3
A
Sorbic Acid
(Fragrance, Preservative)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
PARFUM
(Fragrance, Perfuming)
7
Citral
(Flavoring Agent, Fragrance, Masking)
Allergens
Allergens
5
Citronellol
(Fragrance, Masking)
Allergens
Allergens
5
Hexyl Cinnamal
(Fragrance, Masking)
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

Betaine
Humectant, Skin Conditioning
Bis-Aminopropyl Diglycol Dimaleate
Skin Conditioning
Sodium Hyaluronate
Skin Conditioning, Humectant
Panthenol
Skin Conditioning
Guar Hydroxypropyltrimonium Chloride
Skin Conditioning
FURCELLARIA LUMBRICALIS EXTRACT
Skin Conditioning

Benefits

Fungal-acne (Malassezia) safe
Good for dry skin

Concerns

Contains paraben
Contains eu allergen
Citral — higher EWG
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
Propanediol
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
Betaine
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantAntistatic agentSkin conditioningViscosity controlling
Quaternium-22
Antistatic agent, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentFilm formingHair conditioning
Bis-Aminopropyl Diglycol Dimaleate
Hair conditioning, Hair waving or straightening
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningHair waving or straighteningSkin conditioning
Cetrimonium Chloride
Antistatic agent, Cosmetic biocide
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Antistatic agentCosmetic biocideEmulsifyingSurfactantAntimicrobialPreservative
Hydroxyethylcellulose
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingViscosity increasing agentBindingStabilisingViscosity controlling
PVP
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingHair fixingSuspending agent - nonsurfactantAntistatic agentBindingViscosity controlling
Guar Hydroxypropyltrimonium Chloride
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentHair conditioningViscosity increasing agentFilm formingSkin conditioningViscosity controlling
FURCELLARIA LUMBRICALIS EXTRACT
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Pelvetia Canaliculata Extract
Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 Skin protecting
Xylitylglucoside
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSkin conditioning
Polyquaternium-44
Antistatic agent, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 Antistatic agentFilm formingHair conditioning
Anhydroxylitol
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 HumectantSkin conditioning
Maltitol
Flavoring agent, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Flavoring agentHumectantMaskingMoisturisingSkin conditioning
+ 7 more — see the full ingredients list above
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Panthenol
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentHair conditioningSkin conditioning Good for Dry 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
Citral
Flavoring agent, Fragrance
Higher-hazard ingredient.Read moreShow less
EWG 7 Flavoring agentFragranceMasking Allergens
Citronellol
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking Allergens
Hexyl Cinnamal
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking 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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