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Amino Acid Hair Mask 250 ml
Hair product · no skin ratingContains 3 flagged ingredient groups. Key ingredient: Salicylic acid (BHA). This reading covers ingredient groups, not suitability for hair or scalp.
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Kiehl's Amino Acid Hair Mask is an intensive hair treatment (250 ml). Not counting water, the list has SALICYLIC ACID at no. 13 and amino acids (ARGININE) at no. 15. The list contains no essential oils, silicones, or sulfates. Flagged ingredient groups in the list: fragrance (COUMARIN), drying alcohol (ISOPROPYL ALCOHOL), and watchlist ingredient (COCOS NUCIFERA OIL / COCONUT OIL). The ingredient list has 21 ingredients; hair masks and treatments typically have 27.
Checked against the ingredient list.
Fragrance: COUMARIN Drying alcohol: ISOPROPYL ALCOHOL Watchlist ingredient: COCOS NUCIFERA OIL / COCONUT OIL, GLYCERYL STEARATE SE, ISOPROPYL PALMITATE
The product contains fragrance or declared fragrance allergens.
The product contains a volatile alcohol high in the ingredient list.
The product contains an ingredient commonly considered pore-clogging.
This is a hair product. We read the same ingredient groups as on a skincare product — fragrance, sulfates, silicones and drying alcohols — but we publish no acne-prone rating and no judgment about whose hair or scalp it suits. An ingredient list cannot tell you that.
SALICYLIC ACID · no. 13, not counting water
21 ingredients2 key5 flagged
The key ingredients, grouped by their job in the formula. A group describes the formula, not an effect on skin.
Picked by product type and shared key ingredients. We do not compare whole ingredient lists yet.
€36.40€19.16 / 100 mlat 1 store
€31.00€12.40 / 100 mlat 2 stores
No. The list contains ingredients from the fragrance group: COUMARIN.
Yes. The list contains drying alcohol: ISOPROPYL ALCOHOL.
CETEARYL ALCOHOL. It is the first ingredient in the list, not counting water. Its role in the formula: fatty alcohol.
Hair product · no skin rating
This is a hair product. We read the same ingredient groups as on a skincare product — fragrance, sulfates, silicones and drying alcohols — but we publish no acne-prone rating and no judgment about whose hair or scalp it suits. An ingredient list cannot tell you that.
The ingredient list has 21 ingredients; hair masks and treatments typically have 27.
An oil-soluble acid that can mix with sebum inside the pore.
ARGININE · no. 15, not counting water
Building blocks of protein, and part of the skin's own natural moisturizing factor. In a formula they act as humectants; some also serve as pH adjusters.
Confidence: medium · v2026.10.1
This assessment is read from the ingredient list and is not medical advice. It makes no promise about acne. Individual skin reactions vary.
Read how we classify productsThe order is the manufacturer's own and follows concentration down to the one percent mark. Underlined names are flagged by our criteria. Names with a dotted underline open a short note on what the ingredient does in the formula. Names in bold are key ingredients. The 1% line is an estimate: the EU allows at most 1% phenoxyethanol, so the ingredients listed after it are present at about that level or less.
€7.50€2.50 / 100 mlat 2 stores
€7.50€2.50 / 100 mlat 2 stores
