What is Bear's Foot?

What is Bear's Foot? It is the root of a tall North American daisy plant, Polymnia uvedalia. You may also see it called Leaf Cup, Yellow Leafcup, or by its newer botanical name, Smallanthus uvedalia.

Old American folk healers and Eclectic doctors used the root in two ways. They rubbed it on the skin as an ointment. They also took it by mouth as a bitter root tea or tincture.

Here is the honest verdict. No human trials have tested Bear's Foot for any health problem. A long record of use is not proof that a remedy works, and it is not proof that it is safe.

Today the root is uncommon. It turns up as dried root, a tincture, or a salve, and sometimes in "lymph" blends. It is sold as a supplement, not as an approved medicine.

How does Bear's Foot work?

Does anyone know how Bear's Foot works? No. There is no tested mechanism for this plant in people.

The root does hold sesquiterpene lactones (bitter plant compounds). In test-tube work, compounds of this family can irritate cells, kill some cells, and damp down inflammation signals. Whether any of that happens in a human body is unknown.

The old Eclectic idea was different. Those doctors believed the root "stimulated the glands" and helped drain a swollen spleen or swollen lymph nodes. That idea came from bedside impressions, not from measurement, and it has never been tested.

Some lab work exists on related Smallanthus plants, mostly the food crop yacon. Those findings belong to a different plant part and a different species. They do not tell you what Bear's Foot root does in you.

What forms does Bear's Foot come in?

How is it sold? Mostly in simple, old-style herbal forms.

- Dried cut root, for making a tea or decoction. - Alcohol tincture, usually in drop form. - Ointment, salve or liniment made from the fresh or dried root.

Two other forms show up less often.

- Capsules of powdered root. - A minor part of "lymphatic" or "glandular" herb blends.

The leaf is rarely used. Quality control is weak across all these forms.

Products are often mislabelled with the older name Polymnia. Check the full botanical name, Smallanthus uvedalia.

Where it comes from:

Where does its reputation come from? Mainly American Eclectic medicine in the 1800s and early 1900s.

Eclectic texts, including King's American Dispensatory, listed "bearsfoot ointment" for an enlarged spleen. Doctors of that era rubbed it over the ribs and belly. They also applied it to swollen glands and to sore, inflamed breasts during nursing.

Appalachian folk use ran along the same lines. Some people rubbed the root oil on the scalp as a hair tonic. The bitter root was also taken in small amounts to move a sluggish gut.

The plant faded from use when Eclectic practice closed down in the 1930s. It was never picked up by modern research.

What does Bear's Foot help with?

• Swollen lymph glands: This was the main folk use. Healers rubbed the ointment over swollen nodes in the neck, armpit or groin. No trial has tested this. A swollen gland can mean infection or something more serious. Get a lump that lasts more than two weeks checked by a doctor.
• Enlarged spleen: Eclectic doctors used Bear's Foot ointment over the left ribs for a big spleen. They thought it helped the organ shrink. There is no human study, no imaging data and no modern follow-up. An enlarged spleen has real causes that need testing, such as infection, liver disease or blood disorders.
• Sore, inflamed breast during nursing (mastitis): The salve was applied to hot, hard, painful breasts. It was meant to ease swelling. No evidence supports this. Mastitis can turn into an abscess (a pocket of pus) and often needs antibiotics. See a doctor or midwife rather than treating it yourself.
• Aching joints and muscles, rubbed on: The liniment was used as a warming rub for stiff, sore joints. That fits the wider folk habit of using bitter roots on the skin. No trial has measured pain relief from it. Any effect may come from the rubbing itself or from the alcohol or fat in the base.
• Hair and scalp tonic: Folk users rubbed root oil into the scalp to slow hair loss. Some old adverts picked up the claim. Nothing supports it. There is no study of Bear's Foot and hair growth in people.
• Sluggish bowels: Taken by mouth, the bitter root was used in small amounts to move the gut. Larger amounts were described as purging. That purging effect is the main reason to be careful with internal use. It has not been measured, and heavy purging costs you fluid and salts.

What are the side effects of Bear's Foot?

• Skin rash, redness or itching where the salve is applied
• Allergic reaction in people sensitive to the daisy family
• Nausea and stomach pain after taking it by mouth
• Loose stools, cramping or purging
• A strong bitter taste that lingers
• Rarely, hives, facial swelling or trouble breathing

Good to know:

How common are side effects? Nobody knows, because there is no safety monitoring for this plant.

The best-described problem is contact rash from the salve. That fits the chemistry, since the root holds the same compound family as ragweed and arnica.

By mouth, stomach upset and loose stools are the likely complaints. Severe reactions appear rare in the old records, but those records were never systematic.

How much Bear's Foot should you take?

• Recommended daily: There is no agreed dose for Bear's Foot. No trial has set a safe or useful amount, and products are too rare for a standard to have formed. Labels differ widely. Tinctures tend to be sold in drops, dried root by weight for tea, and salves for the skin only. If you are considering it, go by the label on the exact product and ask a pharmacist or doctor first. Do not scale up an amount because nothing seems to be happening.
• Best time of day: Timing does not matter much, because no effect has been proven. Bitter roots were usually taken before meals, by habit rather than by evidence. Salves were applied whenever the area felt sore. If a product upsets your stomach, that is a reason to stop, not to shift the hour.
• With or without food: Taken by mouth, food may soften the stomach upset that bitter roots can cause. The root is sharp and can turn the stomach on its own. Ointments and liniments are for the skin only. Never swallow a salve or a liniment.
• Time to effect: Nobody can give you an honest number here. There is no measured effect to time. Skin rubs feel warm or soothing within minutes, but that is the rub and the base, not proof the herb worked. For the traditional gland and spleen uses, it may well do nothing at all.
• How long to take it: No safe length of use has been established. Old use was short and aimed at one problem, often a few days to a few weeks. No one has studied what long daily use does to the liver, gut or skin. Treat any long run of it as untested.