Ingredient · dataset v56
Polyisobutene and fungal acne
No known trigger
Why it's not a known trigger
A synthetic hydrocarbon thickener for emulsions; a saturated polymer with no reported feeding role, matching the neutral hydrocarbon ruling.
Evidence strength
Judged neutral — no trigger evidence
Function
Polymer
Also listed as
Polyisobutylene
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 Polyisobutene trigger fungal acne?
No known trigger: A synthetic hydrocarbon thickener for emulsions; a saturated polymer with no reported feeding role, matching the neutral hydrocarbon ruling.
Does Polyisobutene feed Malassezia?
No known link: Polyisobutene 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 Polyisobutene →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.