Is Isobutylparaben or Propylparaben worse?

Isobutylparaben carries the heavier risk profile. See the side-by-side data table for documented risks, country bans, and citations.

Are both Isobutylparaben and Propylparaben banned in the EU?

Isobutylparaben is banned in the EU. Propylparaben is restricted in the EU.

Are they both legal in the US?

Isobutylparaben: allowed in the US. Propylparaben: allowed in the US.

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Isobutylparaben vs Propylparaben: Which is Worse? (2026 Side-by-Side) | BannedPantry

Isobutylparaben vs Propylparaben: which is worse?

Quick answer: Isobutylparaben carries the heavier risk profile. Isobutylparaben is banned in the EU and allowed in the US; Propylparaben is restricted in the EU and allowed in the US.

Property	Isobutylparaben	Propylparaben
EU status	Banned	Restricted
US status	Allowed	Allowed
Risk level	high	high
Banned in	European Union	—
Restricted in	—	European Union
Category	paraben	paraben
Where it hides	lotion, shampoo, makeup	lotion, shampoo, makeup

What is Isobutylparaben?

Isobutylparaben is a paraben preservative used to prevent microbial growth in cosmetics.

What is Propylparaben?

Propylparaben is a paraben preservative used to prevent microbial growth in cosmetics.

Documented risks

Isobutylparaben: Isobutylparaben is an endocrine-disrupting paraben with weak estrogenic activity. The EU banned it in 2014; it remains unrestricted federally in the US.

Propylparaben: Propylparaben is an endocrine-disrupting paraben with weak estrogenic activity. The EU restricts its concentration; it remains unrestricted federally in the US.

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