Hydra Source Daily Leave-In Tonic

Biolage

Hydra Source Daily Leave-In Tonic

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About this product

The Biolage Hydra Source Daily Leave-In Tonic is a misc. Our analysis of its 34 ingredients (16 low-risk) rates it Great (73/100). 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
34
Low-risk
16
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 5/3
Good for dry skin
Orbignya Oleifera Seed Oil Cetearyl Alcohol Cetyl Esters Xylose Sodium Hyaluronate
Caution for dry skin
Trideceth-6 Cetrimonium Chloride Polysorbate 20
Oily/Acne-Prone Skin No data
Sensitive Skin 1/18
Good for sensitive skin
Aloe Barbadensis Leaf Juice
Caution for sensitive skin
Xylose Citric Acid Isopropyl Alcohol Sodium Benzoate Potassium Sorbate Linalool Benzyl Alcohol Citronellol Alpha-Isomethyl Ionone Hexyl Cinnamal Limonene Benzyl Benzoate Cinnamyl Alcohol Isoeugenol Geraniol Coumarin Hydroxycitronellal Amyl Cinnamal

Ingredients list

34 total
Lower hazard (1) Higher hazard (7)
All34 Fragrance17 Masking13 Skin Conditioning9 Preservative6 Perfuming5 Solvent5 Emulsifying4 Antistatic Agent4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Cetearyl Alcohol
(Emulsion Stabilising, Opacifying, Foam Boosting, Viscosity Increasingagent Aqueous, Viscosity Increasing Agent, Emollient, Emulsifying, Viscosity Controlling)
3
B
Polysorbate 20
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
3
B
Behentrimonium Chloride
(Antistatic Agent, Hair Conditioning, Preservative)
PARFUM
(Fragrance, Perfuming)
1
A
Orbignya Oleifera Seed Oil
(Emollient)
1
B
Cetyl Esters
(Skin Conditioning, Emollient)
1
A
Amodimethicone
(Antistatic Agent, Hair Conditioning)
Silicone
Silicone
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
2
A
Isopropyl Alcohol
(Antifoaming Agent, Fragrance, Solvent, Viscosity Decreasing Agent, Perfuming, Viscosity Controlling)
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
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
B
Trideceth-6
(Emulsifying, Surfactant)
4
B
Chlorhexidine Dihydrochloride
(Cosmetic Biocide, Oral Care Agent, Preservative, Antimicrobial)
5
Hexyl Cinnamal
(Fragrance, Masking)
Allergens
Allergens
7
Coumarin
(Fragrance, Masking)
Allergens
Allergens
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
A
Xylose
(Flavoring Agent, Fragrance, Humectant, Masking, Skin Conditioning)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
4
Ethylhexyl Salicylate
(Uv Absorber, Uv Filter)
B
Aloe Barbadensis Leaf Juice
(Skin Conditioning)
Good for Sensitive Skin
Good for Sensitive Skin
3
B
Cetrimonium Chloride
(Antistatic Agent, Cosmetic Biocide, Emulsifying, Surfactant, Antimicrobial, Preservative)
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens
Amyl Cinnamal
(Perfuming)
Allergens
Allergens
7
Geraniol
(Fragrance, Masking, Tonic)
Allergens
Allergens
7
Isoeugenol
(Flavoring Agent, Fragrance, Masking)
Allergens
Allergens
5
Alpha-Isomethyl Ionone
(Perfuming, Skin Conditioning)
Allergens
Allergens
7
Hydroxycitronellal
(Fragrance, Masking)
Allergens
Allergens
6
A
Benzyl Benzoate
(Fragrance, Solvent, Antimicrobial, Masking)
Allergens
Allergens
7
Cinnamyl Alcohol
(Flavoring Agent, Fragrance, Masking)
Allergens
Allergens
5
Citronellol
(Fragrance, Masking)
Allergens
Allergens
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)

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.
Hyaluronic Acid
Hydrates by attracting and holding water.
Antioxidants
Shields skin from free radical damage.

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Redness ReducingSoothes visible redness and calms irritation.
Barrier RepairStrengthen and restore your skin's natural barrier.
Anti-AgingSoftens lines and helps skin look youthful.
BrighteningRestores radiance to dull, tired skin.
Reduces IrritationEases discomfort and supports skin resilience.
Scar HealingImproves the look of marks and scars.
Dark SpotsFades dark spots for even skin tone.

Concerns

Contains silicone
Contains eu allergen
Not fungal acne (malassezia) safe
Coumarin — higher EWG
Geraniol — higher EWG
Isoeugenol — 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
Cetearyl Alcohol
Emulsion stabilising, Opacifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingOpacifyingFoam boostingViscosity increasingagent - aqueousViscosity increasing agentEmollientEmulsifyingViscosity controlling
Behentrimonium Chloride
Antistatic agent, Hair conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Antistatic agentHair conditioningPreservative
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Orbignya Oleifera Seed Oil
Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emollient
Cetyl Esters
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Skin conditioningEmollient
Sodium Benzoate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservativeAnticorrosiveMasking
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Trideceth-6
Emulsifying, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B EmulsifyingSurfactant
Chlorhexidine Dihydrochloride
Cosmetic biocide, Oral care agent
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR B Cosmetic biocideOral care agentPreservativeAntimicrobial
Xylose
Flavoring agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Flavoring agentFragranceHumectantMaskingSkin conditioning
Ethylhexyl Salicylate
Uv absorber, Uv filter
Low-to-moderate hazard.Read moreShow less
EWG 4 Uv absorberUv filter
Cetrimonium Chloride
Antistatic agent, Cosmetic biocide
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Antistatic agentCosmetic biocideEmulsifyingSurfactantAntimicrobialPreservative
Potassium Sorbate
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePreservative
Polysorbate 20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant Fungal-acne trigger
Amodimethicone
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentHair conditioning Silicone
Isopropyl Alcohol
Antifoaming agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A Antifoaming agentFragranceSolventViscosity decreasing agentPerfumingViscosity controlling 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
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
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
Aloe Barbadensis Leaf Juice
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A CIR B Skin conditioning Good for Sensitive Skin
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking 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
Isoeugenol
Flavoring agent, Fragrance
Higher-hazard ingredient.Read moreShow less
EWG 7 Flavoring agentFragranceMasking Allergens
Alpha-Isomethyl Ionone
Perfuming, Skin conditioning
Moderate-hazard ingredient.Read moreShow less
EWG 5 PerfumingSkin conditioning Allergens
+ 5 more — see the full ingredients list above

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.

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