Amino Acid Shampoo

Kiehl's

Where to buy Possibly in stock

About this product

The Kiehl's Amino Acid Shampoo is a misc. Our analysis of its 20 ingredients (16 low-risk) rates it Excellent (86/100). 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
20
Low-risk
16
Fragrance
Contains fragrance

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 5/6
Good for dry skin
Propylene Glycol Coconut Alcohol Cocos Nucifera (Coconut) Oil Hydrolyzed Wheat Starch Lactic Acid
Caution for dry skin
Sodium Lauroyl Glutamate Sodium Methyl Cocoyl Taurate Sodium Coco-Sulfate Salicylic Acid PEG-55 Propylene Glycol Oleate PPG-5-Ceteth-20
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Salicylic Acid
Sensitive Skin 1/8
Good for sensitive skin
Wheat Amino Acids
Caution for sensitive skin
Sodium Chloride Propylene Glycol Cocos Nucifera (Coconut) Oil Salicylic Acid Benzoic Acid Lactic Acid Coumarin Fragrance

Ingredients list

20 total
Lower hazard (1) Higher hazard (8)
All20 Skin Conditioning15 Hair Conditioning7 Viscosity Controlling7 Fragrance6 Masking6 Surfactant5 Foam Boosting4 Viscosity Increasing Agent4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
A
Guar Hydroxypropyltrimonium Chloride
(Antistatic Agent, Hair Conditioning, Viscosity Increasing Agent, Film Forming, Skin Conditioning, Viscosity Controlling)
1
A
Wheat Amino Acids
(Hair Conditioning, Skin Conditioning, Skin Protecting, Soothing)
1
B
Sodium Lauroyl Glutamate
(Antistatic Agent, Hair Conditioning, Surfactant)
1
B
Sodium Methyl Cocoyl Taurate
(Cleansing, Foaming, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Sodium Coco-Sulfate
(Cleansing, Emulsifying, Surfactant)
1
Sodium Chloride
(Bulking Agent, Masking, Oral Care Agent, Viscosity Controlling)
1
Water
(Solvent)
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
1
B
Coco-Betaine
(Antistatic Agent, Hair Conditioning, Skin Conditioning, Sufactant, Foam Boosting, Viscosity Increasing Agent, Viscosity Controlling)
1
A
Coconut Alcohol
(Emulsion Stabilising, Foam Boosting, Viscosity Increasing Agent, Emollient, Emulsifying, Stabilising, Viscosity Controlling)
1
A
Cocos Nucifera (Coconut) Oil
(Fragrance, Hair Conditioning, Skin Conditioning, Emollient, Masking, Solvent)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
4
B
Salicylic Acid
(Antiacne Agent, Antidandruff Agent, Corn/Callus/Wart Remover, Denaturant, Exfoliant, Fragrance, Hair Conditioning, Skin Conditioning, Keratolytic, Masking, Preservative)
Good for Oily Skin
Good for Oily Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
1
B
Hydrolyzed Wheat Protein
(Film Forming, Hair Conditioning, Skin Conditioning, Antistatic Agent)
1
A
Hydrolyzed Wheat Starch
(Humectant, Skin Conditioning, Viscosity Controlling)
3
A
Benzoic Acid
(Fragrance, Ph Adjuster, Preservative, Bulking Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
3
A
PEG-55 Propylene Glycol Oleate
(Sufactant, Surfactant, Viscosity Controlling)
3
B
PPG-5-Ceteth-20
(Emulsifying, Surfactant)
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
7
Coumarin
(Fragrance, Masking)
Allergens
Allergens
8
Fragrance
(Deodorant, Masking, Perfuming)

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

Guar Hydroxypropyltrimonium Chloride
Skin Conditioning
Wheat Amino Acids
Skin Conditioning, Skin Protecting
Propylene Glycol
Humectant, Skin Conditioning
Coco-Betaine
Skin Conditioning
Coconut Alcohol
Emollient
Cocos Nucifera (Coconut) Oil
Skin Conditioning, Emollient

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Barrier RepairStrengthen and restore your skin's natural barrier.
Scar HealingImproves the look of marks and scars.
Anti-AgingSoftens lines and helps skin look youthful.
Reduces IrritationEases discomfort and supports skin resilience.

Concerns

Contains eu allergen
Not fungal acne (malassezia) safe
Coumarin — higher EWG
Fragrance — 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

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
Wheat Amino Acids
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSkin protectingSoothing
Sodium Lauroyl Glutamate
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Antistatic agentHair conditioningSurfactant
Sodium Coco-Sulfate
Cleansing, Emulsifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A CleansingEmulsifyingSurfactant
Sodium Chloride
Bulking agent, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 Bulking agentMaskingOral care agentViscosity controlling
Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Coco-Betaine
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Antistatic agentHair conditioningSkin conditioningSufactantFoam boostingViscosity increasing agentViscosity controlling
Coconut Alcohol
Emulsion stabilising, Foam boosting
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingFoam boostingViscosity increasing agentEmollientEmulsifyingStabilisingViscosity controlling
Hydrolyzed Wheat Protein
Film forming, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Film formingHair conditioningSkin conditioningAntistatic agent
Hydrolyzed Wheat Starch
Humectant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A HumectantSkin conditioningViscosity controlling
PEG-55 Propylene Glycol Oleate
Sufactant, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A SufactantSurfactantViscosity controlling
PPG-5-Ceteth-20
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B EmulsifyingSurfactant
Sodium Methyl Cocoyl Taurate
Cleansing, Foaming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B CleansingFoamingSurfactant 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
Cocos Nucifera (Coconut) Oil
Fragrance, Hair conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceHair conditioningSkin conditioningEmollientMaskingSolvent Bad for Oily SkinFungal-acne trigger
Salicylic Acid
Antiacne agent, Antidandruff agent
Skin irritation can occur at high concentrationRead moreShow less
EWG 4 CIR B Antiacne agentAntidandruff agentCorn/callus/wart removerDenaturantExfoliantFragranceHair conditioningSkin conditioningKeratolyticMaskingPreservative Good for Oily SkinBad for Sensitive Skin
Benzoic Acid
Fragrance, Ph adjuster
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A FragrancePh adjusterPreservativeBulking agentMasking Bad 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
Coumarin
Fragrance, Masking
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceMasking Allergens
Fragrance
Deodorant, Masking
Higher-hazard ingredient.Read moreShow less
EWG 8 DeodorantMaskingPerfuming

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

Pregnancy & breastfeeding

Contains ingredients some choose to avoid or double-check while pregnant or nursing.

Use with caution
BHA (salicylic) (Salicylic Acid)

Low-strength topical salicylic acid (BHA) is generally considered fine. Caution is usually reserved for high-strength leave-on products and salicylic peels.

This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

BHA (salicylic) 0.5–2%

Salicylic acid is OTC-capped at 2%; 0.5–2% is the usual leave-on range. Much below that it acts more as a soothing agent than an exfoliant.

Salicylic Acid

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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