Ingredient · dataset v56
Polyquaternium-51 and fungal acne
No known trigger
Why it's not a known trigger
A cationic quaternium polymer (Lipidure-type) with no fatty side chains; same neutral-polymer basis as the ruled Polyquaternium-10 row.
Polymer basis.
Evidence strength
Judged neutral — no trigger evidence
Function
Polymer
Checked products with this ingredient (1)
Product types: Moisturizers
Moisturizers (1)
Related polymer
- Acrylates Copolymer — No known trigger
- Acrylates Crosspolymer-4 — No known trigger
- Acrylates/C10-30 Alkyl Acrylate Crosspolymer — No known trigger
- Acrylates/Dimethicone Copolymer — No known trigger
- Acrylates/Octylacrylamide Copolymer — No known trigger
- Ammonium Acrylates Copolymer — No known trigger
- Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer — No known trigger
- Ammonium Acryloyldimethyltaurate/VP Copolymer — No known trigger
Sources
EU CosIng database — search the INCI name
Last reviewed: 2026-10-13 (dataset v56).
Questions
Does Polyquaternium-51 trigger fungal acne?
No known trigger: A cationic quaternium polymer (Lipidure-type) with no fatty side chains; same neutral-polymer basis as the ruled Polyquaternium-10 row.
Does Polyquaternium-51 feed Malassezia?
No known link: Polyquaternium-51 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 Polyquaternium-51 →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.