What is Finger root (bush banana)?

Finger root is a woody shrub that grows across West Africa. Its botanical name is Uvaria chamae. In Yoruba it is known as eruju.

The parts used are the root, the root bark and the stem bark. They are boiled into a bitter drink or ground into powder. The small orange fruits grow in finger-like clusters, which is where the English names come from.

Healers have used it for fever, loose stools, wounds and pain. Some people also chew the twigs as a tooth stick.

Here is the honest verdict. Nearly all the research sits in test tubes and in rats and mice. There are no good human trials, so what it does in people is simply not known.

Long use in a tradition is not proof that something works. It is also not proof that it is safe. Both of those apply here, and this page says so once rather than repeating it.

How does Finger root (bush banana) work?

No mechanism has been confirmed in people. Everything below comes from the lab bench or from animals.

In test tubes, extracts of the root and bark slow the growth of some bacteria and fungi. Compounds called benzylated flavanones seem to drive much of this. Whether that happens inside the human body is unknown.

In mice infected with malaria parasites, some extracts lowered parasite counts. The drops were modest and far weaker than standard malaria drugs. No human study has tested this.

In rats, extracts reduced paw swelling in standard tests of inflammation. Researchers link this to the flavanones and triterpenes in the plant. Animal swelling tests do not predict relief of joint pain in people.

The bark is rich in tannins, which pull tissue tight. That astringent feel may explain why healers put it on wounds and used it for loose stools. It is a plausible idea, not a proven one.

One more gap matters. Nobody has shown that these compounds survive digestion and reach the blood in useful amounts.

What forms does Finger root (bush banana) come in?

Most use is of the raw plant, not a packaged product.

Common forms include:

- Dried root or bark pieces sold loose in West African markets - A decoction, meaning bark simmered in water and drunk - Twigs chewed as a tooth-cleaning stick - Dried powder, sometimes mixed into food or drink - Pastes and poultices put on wounds or sores - Bottled mixed herbal drinks (agbo) that list it among several plants - Capsules and tinctures sold online, mostly from small sellers

Two warnings about buying it. Mixed herbal bottles often hide what else is inside, including added painkillers in some reported cases. Capsules are rarely tested for strength or purity, so the label may not match the contents.

Where it comes from:

Uvaria chamae has a deep and well recorded place in West African herbal practice. Plant-use surveys in Nigeria, Ghana, Benin and Côte d'Ivoire record it again and again.

The Yoruba name is eruju. Healers reached for the root and bark for fevers thought to be malaria. They also used it for dysentery, piles, jaundice and sores.

Root preparations were applied to wounds to stop bleeding. The twigs served as tooth sticks for cleaning the mouth.

Some traditions used the root for delayed or painful periods. In parts of the region it was also used to bring on a miscarriage. That history is a serious reason for pregnant readers to stay away.

This section describes what was done in the past. It is a record, not advice to copy.

What does Finger root (bush banana) help with?

• Fevers blamed on malaria: This is the most common traditional use. Healers boiled the root bark and gave it for fever. In mice, some extracts lowered malaria parasite counts. The effect was weak next to real malaria drugs. There are no human trials. Malaria can kill within days. Never use this plant in place of a tested antimalarial medicine.
• Diarrhoea and dysentery: Tradition used bark drinks to firm up loose stools and settle bloody dysentery. The bark is high in tannins, which tighten tissue. In rodent tests, extracts slowed gut movement. No human study supports this. Dehydration is the real danger in severe diarrhoea, and oral rehydration salts treat that.
• Wounds and skin sores: Pastes of root or bark were pressed onto cuts, boils and sores. In rats, extract-treated wounds closed faster in some studies. In test tubes, the plant slows several wound bacteria. Nothing has been tested on human skin in a proper trial. Raw plant paste on an open wound can also carry dirt and germs.
• Pain and swelling: The root was used for joint pain, back pain and swollen limbs. In rats, extracts cut paw swelling and raised pain thresholds in standard tests. These animal results do not tell you whether a person's arthritis or back pain would ease. No human data exists.
• Mouth and tooth care: Chewing sticks made from the twigs were used to clean teeth and gums. In the lab, extracts slow some mouth bacteria. Chewing sticks in general do remove plaque, mostly by the brushing action. No trial has tested this species against a toothbrush. Chewing bark can also scuff the gums.
• Menstrual complaints: Root drinks were given for painful or delayed periods. In some communities the same drink was used to end a pregnancy. That points to an effect on the womb, though it is not proven. There is no human evidence of benefit. The abortion history alone makes this a use to avoid.
• Sickle cell crisis (claimed): Some Nigerian sellers market it for sickle cell disease. A few lab studies report that extracts reduce sickling of red cells in a dish. That is a long way from helping a patient. No trial in people has been done. Sickle cell disease needs specialist care, and crises can be life-threatening.

Which foods are rich in Finger root (bush banana)?

This is not a nutrient, so no food is rich in it. The small ripe fruits are eaten as a wild snack in parts of West Africa, mostly by children. The medicinal parts are the root and bark, which are not food.

What are the side effects of Finger root (bush banana)?

• Nausea and vomiting from the bitter taste
• Stomach cramps
• Diarrhoea or, with heavy use, constipation
• Loss of appetite
• Dizziness
• Sore or irritated gums from chewing sticks
• Skin rash where pastes are applied
• Dark urine or yellow eyes, which signal possible liver trouble

Good to know:

Nobody knows how common these are. No monitored human trial has ever counted side effects for this plant.

The list above comes from users' reports and from animal studies. Stomach upset is the complaint heard most often.

The serious concern is the organs. In rats given high doses over weeks, liver and kidney markers shifted and tissue changes appeared. Yellow eyes, dark urine or deep tiredness are reasons to stop at once and see a doctor.

Two extra risks sit outside the plant itself. Market bark can be misidentified or mouldy. Mixed herbal bottles may contain undeclared drugs.

How much Finger root (bush banana) should you take?

• Recommended daily: No safe or effective amount has been worked out for people. This page gives no figure, because there is none to give. The reasons are plain. No human trial has tested any dose. Root bark, stem bark and leaf differ in strength, and so does every batch. Capsule labels from small sellers do carry numbers. Those numbers come from the seller, not from research, and should not be read as a tested amount.
• Best time of day: Timing has never been studied, so it does not meaningfully matter. The bitter bark drink is harsh on an empty stomach, and many users take it with a meal.
• With or without food: Food is the gentler option. The bark is bitter and high in tannins, which can bring on nausea on an empty stomach. Tannins also block iron from food, so avoid taking it with an iron supplement or an iron-rich meal.
• Time to effect: There is no honest answer. Tradition expected a fever or stomach upset to ease within a few days. No trial has measured anything. It may do nothing at all. If a fever or diarrhoea is not clearly better within 48 hours, get medical care.
• How long to take it: No study has tested how long it is safe to take. Traditional use was usually short, over a few days of illness, not for months. Rodent studies at higher doses report changes in the liver and kidneys. That makes long daily use a poor idea. If you choose to use it at all, discuss it with a doctor or pharmacist first.