Diaboost Hair Thickening Serum

Nioxin

Diaboost Hair Thickening Serum

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About this product

The Nioxin Diaboost Hair Thickening Serum is a misc. Our analysis of its 19 ingredients (9 low-risk) rates it Excellent (81/100). 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
19
Low-risk
9
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 1/5
Good for dry skin
Glycerin
Caution for dry skin
Glycerin Trideceth-6 PEG-30 Dipolyhydroxystearate PEG/PPG-20/23 Dimethicone Alcohol Denat.
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Alcohol Denat.
Sensitive Skin 1/10
Good for sensitive skin
Glycerin
Caution for sensitive skin
Caffeine Glycerin Alcohol Denat. Linalool Citronellol Alpha-Isomethyl Ionone Hexyl Cinnamal Limonene Benzyl Salicylate Mentha Arvensis Leaf Oil

Ingredients list

19 total
Lower hazard (1) Higher hazard (7)
All19 Fragrance8 Masking7 Skin Conditioning6 Perfuming5 Solvent4 Surfactant3 Hair Conditioning3 Emulsion Stabilising3
EWG CIR Ingredient Name & Cosmetic Functions Notes
4
Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
1
Water
(Solvent)
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
3
PEG/PPG-20/23 Dimethicone
(Emulsion Stabilising, Hair Conditioning, Skin Conditioning, Slipmodifier, Surface Modifier, Surfactant)
1
Caffeine
(Fragrance, Skin Conditioning, Masking)
1
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
(Emulsion Stabilising, Film Forming, Viscosity Controlling)
PARFUM
(Fragrance, Perfuming)
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
1
Tetrahydroxypropyl Ethylenediamine
(Chelating Agent)
Mentha Arvensis Leaf Oil
(Masking)
Mentha Piperita Oil
(Fragrance, Perfuming, Refreshing, Tonic)
3
PEG-30 Dipolyhydroxystearate
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
7
Benzyl Salicylate
(Fragrance, Uv Absorber, Masking)
Allergens
Allergens
5
Hexyl Cinnamal
(Fragrance, Masking)
Allergens
Allergens
1
B
Trideceth-6
(Emulsifying, Surfactant)
5
Alpha-Isomethyl Ionone
(Perfuming, Skin Conditioning)
Allergens
Allergens
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens
5
Citronellol
(Fragrance, Masking)
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

Alcohol Denat.
Astringent
Niacinamide
Skin Conditioning
PEG/PPG-20/23 Dimethicone
Skin Conditioning
Caffeine
Skin Conditioning
Glycerin
Humectant, Skin Protecting
Benzyl Salicylate
Uv Absorber

Benefits

Good for oily/acne-prone skin

Concerns

Contains eu allergen
Not fungal acne (malassezia) safe
Benzyl Salicylate — 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
PEG/PPG-20/23 Dimethicone
Emulsion stabilising, Hair conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 Emulsion stabilisingHair conditioningSkin conditioningSlipmodifierSurface modifierSurfactant
Caffeine
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceSkin conditioningMasking
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion stabilising, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 Emulsion stabilisingFilm formingViscosity controlling
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Tetrahydroxypropyl Ethylenediamine
Chelating agent
Low-hazard ingredient.Read moreShow less
EWG 1 Chelating agent
Mentha Arvensis Leaf Oil
Masking
Limited public safety data.Read moreShow less
EWG N/A Masking
Mentha Piperita Oil
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfumingRefreshingTonic
Trideceth-6
Emulsifying, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B EmulsifyingSurfactant
Alcohol Denat.
Antifoaming agent, Antimicrobial
Causes moisture evaporation - prone to dry out skinRead moreShow less
EWG 4 Antifoaming agentAntimicrobialAstringentMaskingSolventViscosity controlling Bad for Dry SkinBad for Sensitive 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
PEG-30 Dipolyhydroxystearate
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 EmulsifyingSurfactant Fungal-acne trigger
Benzyl Salicylate
Fragrance, Uv absorber
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceUv absorberMasking Allergens
Hexyl Cinnamal
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking Allergens
Alpha-Isomethyl Ionone
Perfuming, Skin conditioning
Moderate-hazard ingredient.Read moreShow less
EWG 5 PerfumingSkin conditioning 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
Citronellol
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking Allergens

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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