Allergen & irritant analysis
4 flaggedThis conditioner from Kiehl's lists 22 ingredients. AllerNote's analysis flags 4 known contact allergens in the INCI list. That includes 2 EU-labelled fragrance allergens (parfum, coumarin). No parabens, MI / MCI (isothiazolinones), formaldehyde-releasing preservatives, SLS / SLES sulfates were detected in the listed ingredients.
- ParfumKnown allergen (fragrance): Fragrance Mix I
- Isopropyl alcoholKnown allergen (irritant): Alcohol Denat
- CoumarinKnown allergen (fragrance): Fragrance Mix
- Cetyl alcoholKnown allergen (emollient): Cetyl Alcohol
Not detected: parabens, MI / MCI (isothiazolinones), formaldehyde-releasing preservatives, SLS / SLES sulfates. Contains: added fragrance.
Based on what's flagged, take extra care if you're among:
- People with fragrance allergy or fragrance-sensitive skin
Generated from this product's ingredient list and AllerNote's allergen database — educational, not medical advice or a substitute for patch testing.
Benefits
Key Ingredients
- 1AHAExfoliates skin for a brighter complexion.
- 2Vitamin EProtects skin and soothes irritation.
- 3AntioxidantsShields skin from free radical damage.
Full Ingredient List
22INCI (full list, INCI order): water, cetyl alcohol, behentrimonium chloride, cetyl esters, isopropyl alcohol, citric acid, phenoxyethanol, myristyl alcohol, parfum, simmondsia chinensis seed oil, cocos nucifera oil, aloe barbadensis leaf juice, glycine soja oil, tocopherol, chlorhexidine dihydrochloride, hydroxypropyltrimonium hydrolyzed wheat protein, wheat amino acids, sodium chloride, coumarin, potassium sorbate, disodium edta, sodium benzoate
Tap any ingredient to see details
Potential Concerns
- May Worsen RosaceaCan trigger flare-ups in rosacea-prone skin.
- May Trigger AcneCan clog pores or trigger breakouts.
- May Worsen DrynessCan strip moisture and worsen dryness.
- May Worsen EczemaMay worsen itching or irritation for eczema.
- May Worsen IrritationMay cause stinging, redness, or sensitivity.
Frequently asked questions
Does Amino Acid Conditioner contain fragrance allergens?
Yes — analysing the INCI list, AllerNote found 2 of the EU-labelled fragrance allergens: parfum, coumarin. If you're fragrance-sensitive or patch-test positive to a fragrance mix, treat Amino Acid Conditioner with caution and patch test before full use.
Is Amino Acid Conditioner paraben-free?
No parabens were detected in Amino Acid Conditioner's listed ingredients. Worth keeping in perspective: parabens are among the least common cosmetic allergens, so "paraben-free" matters far less for reactive skin than avoiding fragrance or the preservative MI/MCI.
Is Amino Acid Conditioner suitable for sensitive or allergy-prone skin?
It depends on your specific triggers. Amino Acid Conditioner contains 4 flagged allergens and 0 irritants (listed in the analysis above). If none are on your personal allergen list it may suit you, but patch test first — add your allergens to AllerNote to check Amino Acid Conditioner against your own profile.

