Curl Defining Elixir

Biolage

Where to buy Possibly in stock

About this product

The Biolage Curl Defining Elixir is a misc. Our analysis of its 28 ingredients (13 low-risk) rates it Great (71/100). 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
13
Fragrance
Contains fragrance
Origin
United States
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 2/3
Good for dry skin
Propylene Glycol Lactic Acid
Caution for dry skin
Agave Tequilana Leaf Extract Hydroxypropyl Guar PEG-40 Hydrogenated Castor Oil
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Agave Tequilana Leaf Extract
Sensitive Skin 0/18
Caution for sensitive skin
Propylene Glycol Citric Acid Sodium Benzoate Potassium Sorbate PEG-40 Hydrogenated Castor Oil Lactic Acid Phenoxyethanol Linalool Benzyl Alcohol Alpha-Isomethyl Ionone Hexyl Cinnamal Limonene Butylphenyl Methylpropional Isoeugenol Geraniol Coumarin Hydroxycitronellal Amyl Cinnamal

Ingredients list

28 total
Lower hazard (1) Higher hazard (7)
All28 Fragrance16 Skin Conditioning9 Masking9 Perfuming6 Film Forming5 Solvent4 Preservative4 Humectant3
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Hydroxypropyl Guar
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Antistatic Agent, Binding, Surfactant, Viscosity Controlling)
1
A
VP/VA Copolymer
(Binding, Film Forming, Hair Fixing)
1
Polyquaternium-4
(Antistatic Agent, Film Forming, Hair Fixing)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
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)
3
A
Potassium Sorbate
(Fragrance, Preservative)
3
B
PEG-40 Hydrogenated Castor Oil
(Fragrance, Emulsifying, Surfactant, Perfuming)
Fungal Acne
Fungal Acne Trigger
PARFUM
(Fragrance, Perfuming)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
A
Disodium EDTA
(Chelating Agent, 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
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
3
A
PEG-12 Dimethicone
(Hair Conditioning, Skin Conditioning)
1
Agave Tequilana Leaf Extract
(Cosmetic Astringent)
5
Hexyl Cinnamal
(Fragrance, Masking)
Allergens
Allergens
7
Coumarin
(Fragrance, Masking)
Allergens
Allergens
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens
7
Butylphenyl Methylpropional
(Perfuming)
Allergens
Allergens
5
A
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking)
Allergens
Allergens
7
Hydroxycitronellal
(Fragrance, Masking)
Allergens
Allergens
Amyl Cinnamal
(Perfuming)
Allergens
Allergens
7
Geraniol
(Fragrance, Masking, Tonic)
Allergens
Allergens
5
Alpha-Isomethyl Ionone
(Perfuming, Skin Conditioning)
Allergens
Allergens
7
Isoeugenol
(Flavoring Agent, Fragrance, Masking)
Allergens
Allergens
4
B
Lactic Acid
(Exfoliant, Fragrance, Humectant, Ph Adjuster, Skin Conditioning Agent Humectant, Skin Conditioning, Buffering Agent)
Bad for Sensitive Skin
Bad for Sensitive Skin
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)

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

AHA
Exfoliates skin for a brighter complexion.
Vitamin E
Protects skin and soothes irritation.
Antioxidants
Shields skin from free radical damage.

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
BrighteningRestores radiance to dull, tired skin.
Anti-AgingSoftens lines and helps skin look youthful.
Redness ReducingSoothes visible redness and calms irritation.
Dark SpotsFades dark spots for even skin tone.
Barrier RepairStrengthen and restore your skin's natural barrier.
Show all 6 benefits

Concerns

Contains paraben
Contains eu allergen
Not fungal acne (malassezia) safe
Coumarin — higher EWG
Butylphenyl Methylpropional — higher EWG
Hydroxycitronellal — 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
Hydroxypropyl Guar
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingViscosity increasing agentAntistatic agentBindingSurfactantViscosity controlling
VP/VA Copolymer
Binding, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A BindingFilm formingHair fixing
Polyquaternium-4
Antistatic agent, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 Antistatic agentFilm formingHair fixing
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
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
PEG-12 Dimethicone
Hair conditioning, Skin conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Hair conditioningSkin conditioning
Agave Tequilana Leaf Extract
Cosmetic astringent
Low-hazard ingredient.Read moreShow less
EWG 1 Cosmetic astringent
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
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
PEG-40 Hydrogenated Castor Oil
Fragrance, Emulsifying
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceEmulsifyingSurfactantPerfuming Fungal-acne trigger
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
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
Hexyl Cinnamal
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking Allergens
Coumarin
Fragrance, Masking
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceMasking Allergens
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking Allergens
Butylphenyl Methylpropional
Perfuming
Higher-hazard ingredient.Read moreShow less
EWG 7 Perfuming Allergens
Benzyl Alcohol
External analgesic, Fragrance
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR A External analgesicFragranceOral health care drugPreservativeSolventViscosity decreasing agentMasking Allergens
Hydroxycitronellal
Fragrance, Masking
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceMasking Allergens
Amyl Cinnamal
Perfuming
Limited public safety data.Read moreShow less
EWG N/A Perfuming Allergens
Geraniol
Fragrance, Masking
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceMaskingTonic Allergens
Alpha-Isomethyl Ionone
Perfuming, Skin conditioning
Moderate-hazard ingredient.Read moreShow less
EWG 5 PerfumingSkin conditioning Allergens
Isoeugenol
Flavoring agent, Fragrance
Higher-hazard ingredient.Read moreShow less
EWG 7 Flavoring agentFragranceMasking Allergens
+ 1 more — see the full ingredients list above

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.

Lactic 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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