System 2 Scalp & Hair Thickening Treatment

Nioxin

System 2 Scalp & Hair Thickening Treatment

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About this product

The Nioxin System 2 Scalp & Hair Thickening Treatment is a misc. Our analysis of its 46 ingredients (26 low-risk) rates it Excellent (89/100). 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
46
Low-risk
26
Fragrance
Contains fragrance
Origin
Canada

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
Acetamide MEA Propylene Glycol Camellia Sinensis Leaf Extract Lecithin
Caution for dry skin
Maltodextrin Camellia Sinensis Leaf Extract Sodium Hydroxide Polysorbate 20 Polysorbate 60 Polysorbate 80 Silica Lecithin Vaccinium Myrtillus Leaf Extract
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Camellia Sinensis Leaf Extract Vaccinium Myrtillus Leaf Extract
Sensitive Skin 4/16
Good for sensitive skin
Methyl Nicotinate Camellia Sinensis Leaf Extract Tocopheryl Acetate BHT
Caution for sensitive skin
Methyl Nicotinate Caffeine Propylene Glycol Citric Acid Camellia Sinensis Leaf Extract Sodium Benzoate Potassium Sorbate Methylparaben Ethylparaben Phenoxyethanol Benzyl Alcohol Limonene BHT Butylparaben Propylparaben Mentha Arvensis Leaf Oil

Ingredients list

46 total
Lower hazard (1) Higher hazard (7)
All46 Skin Conditioning29 Fragrance17 Hair Conditioning8 Masking8 Preservative8 Perfuming5 Tonic4 Humectant4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
3
Phenylbenzimidazole Sulfonic Acid
(Uv Absorber, Uv Filter)
1
Caffeine
(Fragrance, Skin Conditioning, Masking)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
3
A
Benzophenone-4
(Uv Absorber, Uv Filter)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
5
A
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking)
Allergens
Allergens
3
A
PEG-12 Dimethicone
(Hair Conditioning, Skin Conditioning)
3
B
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent)
4
B
Cocamidopropyl Betaine
(Antistatic Agent, Hair Conditioning, Skin Conditioning, Sufactant, Foam Boosting, Viscosity Increasing Agent, Viscosity Controlling)
1
B
Acetamide MEA
(Hair Conditioning, Humectant, Foam Boosting, Viscosity Increasing Agent, Antistatic Agent, Skin Conditioning, Viscosity Controlling)
3
B
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
2
A
Tetrasodium EDTA
(Chelating Agent)
1
Methyl Nicotinate
(External Analgesic, Fragrance, Skin Conditioning, Soothing, Tonic)
Mentha Arvensis Leaf Oil
(Masking)
PARFUM
(Fragrance, Perfuming)
3
B
Polysorbate 80
(Denaturant, Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
3
B
Polysorbate 60
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
3
A
PEG-23M
(Binding Agent, Emulsion Stabilising, Viscosity Increasing Agent)
Mentha Piperita Oil
(Fragrance, Perfuming, Refreshing, Tonic)
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
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
Cystine Bis-PG-Propyl Silanetriol
(Skin Conditioning)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
2
3
Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient)
1
A
Biotin
(Hair Conditioning, Skin Conditioning, Antiseborrhoeic)
Citrus Paradisi Peel Extract
(Perfuming, Skin Conditioning)
Humulus Lupulus Extract
(Antimicrobial, Antiperspirant, Fragrance, Hair Conditioning, Skin Conditioning, Skin Protecting)
Urtica Dioica Leaf Extract
(Skin Conditioning)
1
2
A
Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
Vaccinium Myrtillus Leaf Extract
(Astringent, Hair Conditioning, Nail Conditioning, Skin Conditioning)
Acer saccharum extract
(Skin Conditioning)
citrus limon peel extract
(Skin Conditioning, Skin Conditioning Emollient, Skin Protecting, Tonic)
Saccharum Officinarum Extract
(Moisturising, Skin Conditioning)
1
Yeast Extract
(Skin Conditioning)
7
A
Propylparaben
(Fragrance, Preservative, Perfuming)
Paraben
Paraben
Citrus Aurantium Dulcis Fruit Extract
(Fragrance, Skin Conditioning)
3
A
Potassium Sorbate
(Fragrance, Preservative)
1
A
Maltodextrin
(Absorbent, Binding Agent, Emulsion Stabilising, Film Forming, Hair Conditioning, Skin Conditioning, Suspending Agent Nonsurfactant, Binding)
4
A
Methylparaben
(Fragrance, Preservative)
Paraben
Paraben
4
A
Ethylparaben
(Fragrance, Preservative)
Paraben
Paraben
7
A
Butylparaben
(Fragrance, Preservative, Masking)
Paraben
Paraben
6
A
BHT
(Antioxidant, Fragrance, Masking)

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

Niacinamide
Skin Conditioning
Phenylbenzimidazole Sulfonic Acid
Uv Absorber, Uv Filter
Caffeine
Skin Conditioning
Benzophenone-4
Uv Absorber, Uv Filter
PEG-12 Dimethicone
Skin Conditioning
Cocamidopropyl Betaine
Skin Conditioning

Benefits

Good for oily/acne-prone skin

Concerns

Contains paraben
Contains eu allergen
Not fungal acne (malassezia) safe
Propylparaben — higher EWG
Butylparaben — 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
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Phenylbenzimidazole Sulfonic Acid
Uv absorber, Uv filter
Low-to-moderate hazard.Read moreShow less
EWG 3 Uv absorberUv filter
Caffeine
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceSkin conditioningMasking
Benzophenone-4
Uv absorber, Uv filter
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Uv absorberUv filter
Sodium Benzoate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservativeAnticorrosiveMasking
PEG-12 Dimethicone
Hair conditioning, Skin conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Hair conditioningSkin conditioning
Sodium Hydroxide
Denaturant, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantPh adjusterBuffering agent
Cocamidopropyl Betaine
Antistatic agent, Hair conditioning
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR B Antistatic agentHair conditioningSkin conditioningSufactantFoam boostingViscosity increasing agentViscosity controlling
Acetamide MEA
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantFoam boostingViscosity increasing agentAntistatic agentSkin conditioningViscosity controlling
Tetrasodium EDTA
Chelating agent
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A Chelating agent
Methyl Nicotinate
External analgesic, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 External analgesicFragranceSkin conditioningSoothingTonic
Mentha Arvensis Leaf Oil
Masking
Limited public safety data.Read moreShow less
EWG N/A Masking
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
PEG-23M
Binding agent, Emulsion stabilising
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Binding agentEmulsion stabilisingViscosity increasing agent
+ 16 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
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Benzyl Alcohol
External analgesic, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR A External analgesicFragranceOral health care drugPreservativeSolventViscosity decreasing agentMasking Allergens
Propylene Glycol
Fragrance, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceHumectantSkin-conditioningagent - miscellaneousSolventViscosity decreasing agentSkin conditioningViscosity controlling Good for Dry Skin
Polysorbate 80
Denaturant, Emulsifying
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B DenaturantEmulsifyingSurfactant Fungal-acne trigger
Polysorbate 60
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
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
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
Propylparaben
Fragrance, Preservative
Higher-hazard ingredient.Read moreShow less
EWG 7 CIR A FragrancePreservativePerfuming Paraben
Methylparaben
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Ethylparaben
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Butylparaben
Fragrance, Preservative
Higher-hazard ingredient.Read moreShow less
EWG 7 CIR A FragrancePreservativeMasking Paraben
BHT
Antioxidant, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 6 CIR A AntioxidantFragranceMasking

How to use

How to use

  • 1 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.

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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