Educational information, not medical advice — ask your doctor or midwife.
Mulungu is the bark of Erythrina mulungu, a flowering coral tree from Brazil. Folk healers used it as a calming tea for nerves and poor sleep. Today it is sold as capsules, dried bark and liquid drops.
The name coral tree comes from the bright red flowers. Several close Erythrina species are also sold under the same name. Labels often do not say which one is in the bottle.
Here is the honest verdict on the evidence. Calming effects have been seen in rats, not shown in people.
Long traditional use means the plant is familiar. It does not prove the plant works. It does not prove the plant is safe.
The short answer: no one has shown how Mulungu works in a human body.
The bark holds alkaloids, which are strong plant compounds. In rat and mouse tests, two of these alkaloids cut anxiety-like behaviour. Those studies used doses and methods that do not match a cup of tea.
Some lab work points to GABA signalling. GABA is the brain's main calming chemical messenger. That idea comes from animal and cell work, not from people.
Other Erythrina alkaloids block nicotinic receptors in test tubes. These receptors help nerves speak to muscles.
In large amounts, compounds of this family can relax muscle. That is one reason to treat the bark with respect.
None of this tells you what a capsule will do to you.
Mulungu reaches buyers in a few simple forms.
Dried, shredded bark is brewed as a tea in Brazil. Powdered bark in capsules is the common export form. Liquid drops made with alcohol, called a tincture, are also sold.
It often appears inside blended sleep or calm products. Those blends may also hold valerian, passionflower or kava. Mixed products make it hard to know what caused an effect.
Quality control is weak. Species swaps and vague labels are both reported.
Mulungu held a long place in Brazilian folk medicine.
Healers in the Amazon and the north-east brewed the bark as a nerve tonic. It was given for worry, restlessness and broken sleep. Some records also list it for pain, fever and liver complaints.
Colonial-era and later Brazilian plant books recorded these uses. The bark entered regional herb markets and stayed there.
This page describes what was done in the past. It is not a suggestion that you do the same.
Stop taking it and call a doctor if you feel very drowsy, faint or unsteady. Also stop if you notice muscle weakness, a slow pulse or ongoing nausea.
Get emergency help for trouble breathing, collapse, or swelling of the face, lips or throat.
Tell your doctor you have used Mulungu before any operation or dental surgery.
In Brazil, Mulungu is listed as a herbal product and sold in pharmacies and markets. In the United States it is sold as a dietary supplement, which means it is not checked for effect before sale. In the United Kingdom and the European Union it is not a licensed herbal medicine.
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.
One email with the summary. We'll also send a short weekly evidence update — unsubscribe any time.
