Ingredient · dataset v56
PEG-4 Rapeseedamide and fungal acne
No known trigger
Why it's not a known trigger
An ethoxylated rapeseed fatty-acid amide; the C18:1 tail is bound to nitrogen as an amide, not an ester Malassezia yeast's lipases split, so it falls under the amide rule (Cocamide MEA, Sodium Methyl Oleoyl Taurate).
The amide bond is the open question: no Malassezia amidase acting on fatty amides is on record, and if one were shown this re-rules at once.
Evidence strength
Judged neutral — no trigger evidence
Function
Surfactant
Also listed as
PEG-4 Rapeseed Amide
Related surfactant
- Ammonium Laureth Sulfate — No known trigger
- Ammonium Lauryl Sulfate — No known trigger
- Ammonium Xylenesulfonate — No known trigger
- C12-20 Alkyl Glucoside — No known trigger
- C20-22 Alkyl Phosphate — May trigger · Limited evidence
- Capryloyl Glycine — No known trigger
- Caprylyl/Capryl Glucoside — No known trigger
- Cetearyl Glucoside — No known trigger
Sources
- PCC Group — PEG-4 Rapeseedamide is the ethoxylated rapeseed-oil fatty-acid monoethanolamide (CAS 85536-23-8), a rinse-off thickener/foam booster
- Park, Park & Jung 2021 — Malassezia's characterised secreted lipases act on mono-, di- and tri-glycerides (review of Malassezia lipases)
- EU CosIng database — search the INCI name
Last reviewed: 2026-10-13 (dataset v56).
Questions
Does PEG-4 Rapeseedamide trigger fungal acne?
No known trigger: An ethoxylated rapeseed fatty-acid amide; the C18:1 tail is bound to nitrogen as an amide, not an ester this yeast's lipases split, so it falls under the amide rule (Cocamide MEA, Sodium Methyl Oleoyl Taurate).
Does PEG-4 Rapeseedamide feed Malassezia?
No known link: PEG-4 Rapeseedamide is judged with no known trigger. One screened ingredient is not a product verdict — when in doubt, ask a dermatologist.
Is this medical advice?
No. We screen ingredient lists; we never diagnose, treat, or certify products. When in doubt, ask a dermatologist.
Check a full list containing PEG-4 Rapeseedamide →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.