Is Polyisobutene fungal acne safe?

No, Polyisobutene is considered a trigger for fungal acne (Malassezia) as it typically contains lipids or esters that feed the yeast.

Is Polyisobutene safe for pregnancy?

Yes, Polyisobutene is generally considered safe for use during pregnancy.

Is Polyisobutene vegan?

Yes, Polyisobutene is typically vegan.

Is Polyisobutene comedogenic?

No, Polyisobutene has a low comedogenic rating of 1/5 and is unlikely to clog pores.

Polyisobutene

Hydrogenated Polyisobutene

Good

Safe

Pores

1/5

Irritancy

0/5

FA Safe

❌ No

Pregnancy

✅ Safe

Vegan

✅ Yes

Science & Benefits

A synthetic hydrocarbon polymer used to increase the viscosity and 'richness' of a formula. Unlike vegetable oils, it is highly stable and does not oxidize on the skin. Its large molecular size prevents it from entering the pore. It functions as a non-occlusive moisture shield. It is a 'bulletproof' choice for adding texture to acne-safe moisturizers without the risk of inducing acne cosmetica.

Safety Alerts

🍄

Fungal Acne: This ingredient is a lipid/ester that can feed Malassezia yeast. Avoid if you have active FA bumps.