Strength & Volume Shampoo

Define

Strength & Volume Shampoo

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About this product

The Define Strength & Volume Shampoo is a misc. Our analysis of its 18 ingredients (11 low-risk) rates it Excellent (95/100). 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
18
Low-risk
11
Fragrance
Contains fragrance
Origin
Norway
Data updated
May 2026

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 1/4
Good for dry skin
Glycerin
Caution for dry skin
Xanthan Gum Glycerin Sodium Laureth Sulfate PEG-4 Rapeseedamide
Oily/Acne-Prone Skin No data
Sensitive Skin 1/7
Good for sensitive skin
Glycerin
Caution for sensitive skin
Sodium Chloride Glycerin Tartaric Acid Citric Acid Sodium Benzoate Potassium Sorbate Benzyl Alcohol

Ingredients list

18 total
Lower hazard (1) Higher hazard (5)
All18 Fragrance7 Masking5 Viscosity Controlling5 Hair Conditioning5 Humectant4 Viscosity Increasing Agent4 Skin Conditioning4 Solvent4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
3
Sodium Laureth Sulfate
(Cleansing, Emulsifying, Foaming, Surfactant)
Bad for Oily Skin
Bad for Oily Skin
Sulfate
Sulfate
4
B
Cocamidopropyl Betaine
(Antistatic Agent, Hair Conditioning, Skin Conditioning, Sufactant, Foam Boosting, Viscosity Increasing Agent, Viscosity Controlling)
3
PEG-4 Rapeseedamide
(Emulsifying, Surfactant, Viscosity Increasing Agent, Viscosity Controlling)
PPG-3 Caprylyl Ether
(Foam Boosting, Solvent)
1
Sodium Chloride
(Bulking Agent, Masking, Oral Care Agent, Viscosity Controlling)
Hydroxypropylgluconamide
(Hair Conditioning, Humectant)
Hydroxypropylammonium Gluconate
(Hair Conditioning, Humectant)
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
A
Guar Hydroxypropyltrimonium Chloride
(Antistatic Agent, Hair Conditioning, Viscosity Increasing Agent, Film Forming, Skin Conditioning, Viscosity Controlling)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
Monosodium Citrate
(Buffering Agent)
1
Tartaric Acid
(Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
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)
5
A
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking)
Allergens
Allergens
3
A
Potassium Sorbate
(Fragrance, Preservative)
PARFUM
(Fragrance, Perfuming)

My Ingredient Notes

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Key ingredients

Cocamidopropyl Betaine
Skin Conditioning
Hydroxypropylgluconamide
Humectant
Hydroxypropylammonium Gluconate
Humectant
Glycerin
Humectant, Skin Protecting
Guar Hydroxypropyltrimonium Chloride
Skin Conditioning
Xanthan Gum
Skin Conditioning

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Scar HealingImproves the look of marks and scars.
Barrier RepairStrengthen and restore your skin's natural barrier.

Concerns

Contains sulfate
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
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
PEG-4 Rapeseedamide
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 EmulsifyingSurfactantViscosity increasing agentViscosity controlling
PPG-3 Caprylyl Ether
Foam boosting, Solvent
Limited public safety data.Read moreShow less
EWG N/A Foam boostingSolvent
Sodium Chloride
Bulking agent, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 Bulking agentMaskingOral care agentViscosity controlling
Hydroxypropylgluconamide
Hair conditioning, Humectant
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningHumectant
Hydroxypropylammonium Gluconate
Hair conditioning, Humectant
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningHumectant
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
Xanthan Gum
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingSkin conditioningSurfactant -emulsifying agentViscosity increasing agentBindingGel formingViscosity controlling
Monosodium Citrate
Buffering agent
Limited public safety data.Read moreShow less
EWG N/A Buffering agent
Sodium Benzoate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservativeAnticorrosiveMasking
Potassium Sorbate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservative
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Sodium Laureth Sulfate
Cleansing, Emulsifying
Potentially comedogenic - can block poresRead moreShow less
EWG 3 CleansingEmulsifyingFoamingSurfactant Bad for Oily SkinSulfate
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
Tartaric Acid
Fragrance, Ph adjuster
Skin irritation can occur at high concentrationRead moreShow less
EWG 1 FragrancePh adjusterBuffering agentMasking Bad for Sensitive 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
Benzyl Alcohol
External analgesic, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR A External analgesicFragranceOral health care drugPreservativeSolventViscosity decreasing agentMasking Allergens

How to use

How to use

  • 1 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 2 Wear SPF the next day: Acids and retinoids increase sun sensitivity — daily sunscreen is a must while using this.

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.

AHA (acid exfoliant) 5–10% (OTC)

OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.

Tartaric Acid

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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