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Nomination Summary for Butterbur (N20903)

Nominated Substances: Butterbur

Nomination Date: 06/10/2009

Nominator: NIEHS

Rationale: Use as a dietary supplement; lack of toxicological data; suspicion of toxicity based on pharmacological activity of constituents; potential presence of hepatotoxic pyrrolizidine alkaloids

NTP Principles: not specified

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