| 11. | The company does not test supplements which are known to be hazardous, like comfrey.
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| 12. | It took me 15 years to find the variegated giant comfrey, Symphytum uplandicum Variegatum.
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| 13. | Comfrey should not be harvested in its first season as it needs to become established.
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| 14. | Plants such as Comfrey and Petasites have specific toxicity due to hepatotoxic pyrrolizidine alkaloid content.
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| 15. | Comfrey has been used in folk medicine as a poultice for treating burns and wounds.
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| 16. | Purslane and comfrey have proven effective choices.
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| 17. | Comfrey will rapidly regrow, and will be ready for further cutting about 5 weeks later.
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| 18. | The comfrey bed should be well prepared by weeding thoroughly, and dressing with manure if available.
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| 19. | But comfrey is unregulated in the United States, and readily available in most health-food stores.
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| 20. | Comfrey also can cause liver problems, and tests in animals suggest it impairs the lungs and kidneys.
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