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Subchronic toxicity study of peppermint oil in rats
1Institute of Toxicology, National Food Agency, Soeborg, Denmark.
Toxicology Letters
|September 1, 1992
Abstract:
Peppermint oil was given p.o. to four groups of 28 rats at dosage levels of 0, 10, 40, and 100 mg/kg body wt. per day for 90 days. At the highest dose histopathological changes consisting of cyst-like spaces scattered in the white matter of cerebellum were seen. No other signs of encephalopathy were observed. Nephropathy was seen in the male rats in the highest dose group. A no-observed-adverse-effect level of 40 mg/kg body wt. per day was determined.

