Comfrey
Symphytum officinale
also known as comfrey root, comfrey leaf
A topical-only herb, traditionally used on bruises, sprains, and slow-healing wounds. The root and leaf contain pyrrolizidine alkaloids that can cause severe liver injury if taken internally — never swallow.
- Eases bruises, sprains, and muscle strains topically
- Supports the healing of broken bones — old folk name is knitbone
- Allantoin promotes skin cell turnover
- Mucilage soothes inflamed skin
Topical use only — never take internally
Pyrrolizidine alkaloids can cause severe liver injury (veno-occlusive disease)
Do not apply to broken or open skin
Avoid in pregnancy and nursing
Do not use on infants or young children
Limit topical use to 4 to 6 weeks at a time
Memorial Sloan Kettering About Herbs · EMA Herbal Medicinal Product Monographs · American Botanical Council HerbMedPro
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