Hyaluron Aqua Soft Toner

SECRET KEY

Where to buy Possibly in stock

About this product

The SECRET KEY Hyaluron Aqua Soft Toner is a toner. Our analysis of its 54 ingredients (35 low-risk) rates it Excellent (94/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.

Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Toners
Ingredients
54
Low-risk
35
Fragrance
Fragrance-free
Origin
South Korea

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 14/4
Good for dry skin
Sorbitol Caprylyl Glycol Butylene Glycol Sodium PCA Sodium Hyaluronate Glycerin Propylene Glycol Trehalose Polyquaternium-51 Hydrolyzed Collagen Hydrolyzed Hyaluronic Acid Urea Lactic Acid Aloe Barbadensis Leaf Extract
Caution for dry skin
Centella Asiatica Extract Sodium Salicylate Sambucus Nigra Fruit Extract Glycerin
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Sambucus Nigra Fruit Extract
Sensitive Skin 7/14
Good for sensitive skin
Centella Asiatica Extract Glycerin Sodium Nitrate Camellia Sinensis Leaf Water Aloe Barbadensis Leaf Extract Thuja Occidentalis Leaf Extract Aloe Barbadensis Leaf Juice
Caution for sensitive skin
Hippophae Rhamnoides Extract Sorbitol Butylene Glycol Glycerin Propylene Glycol Tartaric Acid Citric Acid Camellia Sinensis Leaf Water Lactic Acid Methylparaben Phenoxyethanol Glyoxal Malic Acid Thuja Occidentalis Leaf Extract

Ingredients list

54 total
Lower hazard (1) Higher hazard (10)
All54 Skin Conditioning44 Humectant19 Fragrance12 Hair Conditioning9 Solvent7 Buffering Agent6 Film Forming5 Ph Adjuster5
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
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
Methylpropanediol
(Solvent)
1
A
Pentylene Glycol
(Skin Conditioning, Solvent)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
B
Sodium Salicylate
(Denaturant, Preservative)
1
B
Camellia Sinensis Leaf Water
(Masking, Perfuming, Tonic)
Good for Oily Skin
Good for Oily Skin
Melaleuca Alternifolia Leaf Water
(Anti Sebum, Antimicrobial, Astringent, Tonic)
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
4
B
Glycolic Acid
(Exfoliant, Ph Adjuster, Buffering Agent)
Good for Oily Skin
Good for Oily Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
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
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
B
Centella Asiatica Extract
(Cleansing, Skin Conditioning, Smoothing, Soothing, Tonic)
1
A
Trehalose
(Flavoring Agent, Humectant, Moisturising)
1
B
Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
1
Sorbitol
(Flavoring Agent, Fragrance, Humectant, Plasticizer, Skin Conditioning)
3
A
Urea
(Buffering Agent, Humectant, Antistatic Agent, Skin Conditioning)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
1
Polyquaternium-51
(Film Forming, Humectant, Skin Conditioning)
3
4
B
Malic Acid
(Fragrance, Ph Adjuster, Buffering Agent)
1
Tartaric Acid
(Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
1
A
Hydrolyzed Collagen
(Hair Conditioning, Nail Conditioning Agent, Skin Conditioning, Antistatic Agent, Emollient, Film Forming, Humectant)
B
Aloe Barbadensis Leaf Juice
(Skin Conditioning)
Good for Sensitive Skin
Good for Sensitive Skin
1
Hydrolyzed Hyaluronic Acid
(Hair Conditioning, Humectant, Skin Conditioning)
Citrus Limon Fruit Extract
(Fragrance, Skin Conditioning)
1
Vaccinium Myrtillus Fruit Extract
(Skin Conditioning)
Pyrus Malus Fruit Extract
(Skin Conditioning)
Saccharum Officinarum Extract
(Moisturising, Skin Conditioning)
Vitis Vinifera Fruit Extract
(Skin Conditioning)
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
Angelica Dahurica Root Extract
(Skin Conditioning)
1
Chrysanthemum Morifolium Flower Extract
(Skin Conditioning)
Chamomilla Recutita Leaf Extract
(Fragrance, Skin Conditioning)
1
Hippophae Rhamnoides Extract
(Masking, Skin Conditioning)
1
Morus Alba Root Extract
(Bleaching, Skin Conditioning)
Thuja Occidentalis Leaf Extract
(Antioxidant, Bleaching, Hair Conditioning, Perfuming, Skin Conditioning)
1
Vitex Trifolia Fruit Extract
(Skin Conditioning)
Urtica Dioica Extract
(Anti Seborrheic, Astringent, Hair Conditioning, Skin Conditioning, Soothing, Tonic)
persea gratissima fruit extract
(Moisturising, Skin Conditioning, Skin Conditioning Emollient, Smoothing, Soothing)
1
3
B
Aloe Barbadensis Leaf Extract
(Emollient, Humectant, Oral Care Agent, Skin Conditioning)
Good for Sensitive Skin
Good for Sensitive Skin
1
Sambucus Nigra Fruit Extract
(Astringent)
Asarum Sieboldii Root Extract
(Skin Conditioning)
1
Cnidium Officinale Root Extract
(Skin Conditioning)
1
Eclipta Prostrata Extract
(Skin Conditioning)
Juglans Regia Seed Extract
(Skin Conditioning)
Simmondsia Chinensis Seed Extract
(Abrasive, Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient)
1
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
A
1,2-Hexanediol
(Solvent)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
4
A
Methylparaben
(Fragrance, Preservative)
Paraben
Paraben
10
B
Glyoxal
(Antimicrobial)
1
Sodium Nitrate
(Oral Care Agent, Soothing)

My Ingredient Notes

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Key ingredients

Glycerin
Humectant, Skin Protecting
Pentylene Glycol
Skin Conditioning
Sodium Hyaluronate
Skin Conditioning, Humectant
Butylene Glycol
Skin Conditioning, Humectant
Melaleuca Alternifolia Leaf Water
Astringent
Propylene Glycol
Humectant, Skin Conditioning

Benefits

Good for dry skin
Good for oily/acne-prone skin

Concerns

Contains paraben
Not fungal acne (malassezia) safe
Glyoxal — 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
Methylpropanediol
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Pentylene Glycol
Skin conditioning, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningSolvent
Sodium Salicylate
Denaturant, Preservative
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B DenaturantPreservative
Melaleuca Alternifolia Leaf Water
Anti sebum, Antimicrobial
Limited public safety data.Read moreShow less
EWG N/A Anti sebumAntimicrobialAstringentTonic
Centella Asiatica Extract
Cleansing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B CleansingSkin conditioningSmoothingSoothingTonic
Trehalose
Flavoring agent, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Flavoring agentHumectantMoisturising
Sorbitol
Flavoring agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 Flavoring agentFragranceHumectantPlasticizerSkin conditioning
Urea
Buffering agent, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Buffering agentHumectantAntistatic agentSkin conditioning
Polyquaternium-51
Film forming, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 Film formingHumectantSkin conditioning
Malic Acid
Fragrance, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3–4 CIR B FragrancePh adjusterBuffering agent
Hydrolyzed Collagen
Hair conditioning, Nail conditioning agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningNail conditioning agentSkin conditioningAntistatic agentEmollientFilm formingHumectant
Hydrolyzed Hyaluronic Acid
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningHumectantSkin conditioning
Citrus Limon Fruit Extract
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioning
Vaccinium Myrtillus Fruit Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
+ 23 more — see the full ingredients list above
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
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Camellia Sinensis Leaf Water
Masking, Perfuming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B MaskingPerfumingTonic Good for Oily Skin
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
Glycolic Acid
Exfoliant, Ph adjuster
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B ExfoliantPh adjusterBuffering agent Good for Oily SkinBad for Sensitive Skin
Lactic Acid
Exfoliant, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B ExfoliantFragranceHumectantPh adjusterSkin-conditioning agent -humectantSkin conditioningBuffering agent 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
Sodium PCA
Hair conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningHumectantAntistatic agentSkin conditioning 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
Tartaric Acid
Fragrance, Ph adjuster
Skin irritation can occur at high concentrationRead moreShow less
EWG 1 FragrancePh adjusterBuffering agentMasking Bad for Sensitive 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
Aloe Barbadensis Leaf Extract
Emollient, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 1–3 CIR B EmollientHumectantOral care agentSkin conditioning Good for Sensitive Skin
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Methylparaben
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
+ 1 more — see the full ingredients list above

How to use

How to use

  • 1 Where it fits: Use right after cleansing, before serums.
  • 2 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 3 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.

Glycolic Acid, Lactic Acid, Malic Acid, 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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