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Quick answer: Both score equally on our risk model. Melengestrol acetate is banned in the EU and allowed in the US; Zeranol is banned in the EU and allowed in the US.
| Property | Melengestrol acetate | Zeranol |
|---|---|---|
| EU status | Banned | Banned |
| US status | Allowed | Allowed |
| Risk level | high | high |
| Banned in | European Union | European Union |
| Restricted in | — | — |
| Category | hormone | hormone |
| Where it hides | beef | beef |
Melengestrol acetate is a synthetic progestin fed to feedlot heifers to suppress estrus and boost growth.
Zeranol is a non-steroidal estrogenic growth implant used in US beef cattle.
Melengestrol acetate: Banned in the EU as a hormonal growth promoter.
Zeranol: Banned in the EU since 1989 as a hormonal growth promoter with endocrine activity.
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