Analysis of Herbal Teas made from the Leaves of Comfrey (Symphytum Officinale): Reduction of N-Oxides Results in Order of Magnitude Increases in the Measurable Concentration of Pyrrolizidine Alkaloids

Oberlies, N., Kim, N-C., Brine, D., Collins, BJ., Handy, R., Sparacino, C., Wani, M., & Wall, M. (2004). Analysis of Herbal Teas made from the Leaves of Comfrey (Symphytum Officinale): Reduction of N-Oxides Results in Order of Magnitude Increases in the Measurable Concentration of Pyrrolizidine Alkaloids. Public Health Nutrition, 7(7), 919-924.

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