Allergen & irritant analysis
7 flaggedThis shampoo from Cien lists 15 ingredients. AllerNote's analysis flags 6 known contact allergens and 1 common irritant in the INCI list. That includes 1 EU-labelled fragrance allergen (parfum). No parabens, formaldehyde-releasing preservatives were detected in the listed ingredients.
- ParfumKnown allergen (fragrance): Fragrance Mix I
- MethylchloroisothiazolinoneKnown allergen (preservative): Methylchloroisothiazolinone
- MethylisothiazolinoneKnown allergen (preservative): Methylisothiazolinone
- Acrylates copolymerKnown allergen (nail_product): Acrylates
- Sodium laureth sulfateKnown allergen (surfactant): Sodium Laureth Sulfate
- Cocamidopropyl betaineKnown allergen (surfactant): Cocamidopropyl Betaine
- Sodium hydroxideStrong alkaline substance that can be highly corrosive and irritating in high concentrations; used safely in cosmetics only in neutralized, low concentrations for pH adjustment.
Not detected: parabens, formaldehyde-releasing preservatives. Contains: added fragrance, MI / MCI (isothiazolinones), SLS / SLES sulfates.
Based on what's flagged, take extra care if you're among:
- People with fragrance allergy or fragrance-sensitive skin
- People sensitised to preservatives (e.g. MI/MCI or formaldehyde releasers)
- People prone to irritation, or with very dry / eczema-prone skin
Generated from this product's ingredient list and AllerNote's allergen database — educational, not medical advice or a substitute for patch testing.
Full Ingredient List
15INCI (full list, INCI order): active ingredients: zinc pyrithione 1% inactive ingredients: water, sodium laureth sulfate, acrylates copolymer, cocamidopropyl betaine, sodium chloride, glycol distearate, parfum, laureth-4, polyquaternium-113, sodium hydroxide, zinc chloride, methylchloroisothiazolinone, methylisothiazolinone, ci 42090, ci 17200
Tap any ingredient to see details
Potential Concerns
- May Worsen EczemaMay worsen itching or irritation for eczema.
- 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 IrritationMay cause stinging, redness, or sensitivity.
- May Worsen Oily SkinMay increase shine or excess oil.
Frequently asked questions
Does Classic Clean Shampoo contain fragrance allergens?
Yes — analysing the INCI list, AllerNote found 1 of the EU-labelled fragrance allergens: parfum. If you're fragrance-sensitive or patch-test positive to a fragrance mix, treat Classic Clean Shampoo with caution and patch test before full use.
Is Classic Clean Shampoo paraben-free?
No parabens were detected in Classic Clean Shampoo'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 Classic Clean Shampoo suitable for sensitive or allergy-prone skin?
It depends on your specific triggers. Classic Clean Shampoo contains 6 flagged allergens and 1 irritant (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 Classic Clean Shampoo against your own profile.

