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Quick answer: BHA (cosmetic) carries the heavier risk profile. BHA (cosmetic) is restricted in the EU and allowed in the US; Cyclopentasiloxane is restricted in the EU and allowed in the US.
| Property | BHA (cosmetic) | Cyclopentasiloxane |
|---|---|---|
| EU status | Restricted | Restricted |
| US status | Allowed | Allowed |
| Risk level | high | medium |
| Banned in | — | — |
| Restricted in | European Union | European Union |
| Category | endocrine disruptor | endocrine disruptor |
| Where it hides | lipstick, moisturizer, makeup | hair serum, primer, deodorant |
BHA (cosmetic) is butylated hydroxyanisole, an antioxidant preservative in cosmetics.
Cyclopentasiloxane is a volatile silicone (D5) used for smooth, silky texture.
BHA (cosmetic): A suspected endocrine disruptor and possible carcinogen; flagged on EU endocrine lists. Unrestricted in US cosmetics.
Cyclopentasiloxane: Persistent and bioaccumulative; the EU restricts D5 in wash-off products over environmental and endocrine concerns. The US has no restriction.
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