Educational information, not medical advice — ask your doctor or midwife.
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Bearsfoot is the root of Polymnia uvedalia, a tall North American plant in the daisy family. It is also called Leaf Cup, Yellow Leaf Cup and Uvedalia. Folk and Eclectic healers mostly rubbed it on the skin as an ointment for swollen glands and sore joints.
The honest verdict: there are no human trials of any size behind these uses. Traditional use is a record of what people did, not proof that it works or that it is safe. Both of those things still have to be shown, and for bearsfoot they have not been.
One naming problem matters more than anything else on this page. "Bear's foot" is also a common name for stinking hellebore (Helleborus foetidus), a plant that can poison the heart. If a product does not name Polymnia uvedalia or Smallanthus uvedalia on the label, do not assume you know what is in it.
Bearsfoot is rare today. You are most likely to meet it in a small-batch tincture, a liniment, or an old herbal book.
No one has shown how bearsfoot works in people, because the studies have not been done.
The root holds a group of compounds called sesquiterpene lactones. In laboratory tests, lactones of this type can kill cells and slow some microbes. Whether any of that happens in a human body, at any sensible amount, is unknown.
Eclectic doctors had their own theory. They called bearsfoot a "stimulant to the lymphatic system", meaning they thought it moved fluid out of swollen glands. That idea came from bedside impression, not from measurement, and it has never been tested.
The same lactones may explain the skin rashes some people get from handling the fresh plant. That link is reasonable but not proven for this species.
Bearsfoot is sold and used in a few forms:
- Dried, cut root, for home-made preparations - Alcohol tincture of the fresh or dried root - Ointment, salve or liniment for use on the skin - Rarely, capsules of powdered root - As a minor part of blended "lymph" formulas
Skin products were the main traditional form. Internal use was less common even in its own era.
Few mainstream brands carry it. Most supply comes from small herb sellers, which means less testing and more risk of the wrong plant in the bag.
Bearsfoot belongs to American folk practice and to the Eclectic physicians of the 1800s and early 1900s.
King's American Dispensatory and similar books listed it as an outward remedy. Practitioners applied the ointment over swollen lymph glands, sore breasts during breastfeeding, and stiff or painful joints. They also used it for "ague cake", an old term for a spleen swollen after malaria.
Taken by mouth in larger amounts, it was described as a purgative that emptied the bowels, sometimes with vomiting. That was treated as a known effect of the plant, not an accident.
It faded from use as the Eclectic schools closed. This page records that history; it is not an instruction to repeat it.
Stop using it and see a doctor if you get a rash, blisters or swelling where you applied it.
Get medical advice the same week if you have a lump or swollen gland that lasts more than two weeks, a fever, night sweats, or weight loss you cannot explain. Those need tests, not a salve.
Go to an emergency department now if you have a slow or irregular heartbeat, chest pain, fainting, blurred vision, vomiting that will not stop, or yellow skin or eyes. Take the product and its label with you.
In the United States, bearsfoot may be sold as a dietary supplement; it is not an approved drug and the FDA has not judged it safe or effective for any condition. In the UK, EU, Canada and Australia it has no licensed medicinal status and is rarely offered for sale.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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