saracura-mirá
Quick Facts
- What it is: Saracura-mirá is the saponin-rich bark of an Amazon vine, drunk as a frothy cold-water tonic.
- Main uses: Traditional malaria prevention, Urinary and kidney complaints, Fluid retention, Tiredness
- Active ingredients: Dammarane-type triterpene saponins, Jujubogenin glycosides, Ampelozizyphoside, Tannins, Plant sterols
- Forms: Shredded bark, Bark powder, Cold-water infusion, Capsules, Tincture
- Time to effect: Unproven; it may do nothing at all.
- Side effects: Mostly stomach upset and extra urine; never rely on it against malaria.
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What is saracura-mirá?
Saracura-mirá is the bark of a woody Amazon vine. Its botanical name is Ampelozizyphus amazonicus. It grows in the upper Rio Negro region of Brazil and in nearby parts of Venezuela and Colombia.
The scraped bark is soaked in cold water. The water turns frothy, a bit like weak beer. People drink it as a general tonic, and above all as a traditional guard against malaria.
Here is the honest verdict. Nearly all the research sits in test tubes and rats, and no controlled human trial has been published. Long traditional use shows that people valued the bark; it does not prove the bark works, and it does not prove it is safe.
How does saracura-mirá work?
The short answer: no one has shown how it works in people.
The bark is packed with saponins. These are soap-like plant compounds, and they are why the water foams.
In rats, a water extract of the bark raised urine output. That fits the old use as a kidney and urine tonic. Whether it does the same in you is untested.
In mice, bark extracts lowered the number of malaria parasites that settled in the liver. The same line of work found little effect on parasites already in the blood. This has never been shown in humans.
Saponins as a group can break open red blood cells in test-tube studies. That is a lab finding, not a proven risk from a cup of the bark water. It is still a reason not to treat the bark as harmless.
What forms does saracura-mirá come in?
You will mostly meet it as raw bark.
Common forms include:
- Shredded or scraped bark, sold loose in Amazon markets - Bark powder - A cold-water infusion, which foams when shaken - Capsules of dried bark powder - Alcohol tinctures and mixed 'tonic' bottles
The cold-water drink is the traditional form. It is often called the 'little beer of the forest' because of the thick white head it makes.
Quality control is weak. Bark is often sold unlabelled and without a named supplier. Mixed tonics may contain other herbs or alcohol that are not listed.
Where it comes from:
Indigenous peoples of the upper Rio Negro have used this bark for generations. Baniwa, Tukano and Arapaso communities are the best recorded.
The bark drink was taken before long trips into the forest and during the rainy season. People used it in the hope of warding off malaria and of keeping their strength up. River traders, rubber tappers and settlers later picked up the habit.
Ethnobotanists wrote the practice down during the twentieth century. Brazilian labs began studying the bark's chemistry from the 1980s onward.
The drink also had a social and ritual place, not only a medical one. It was shared at gatherings, which is part of why the name travelled so widely.
Who should avoid saracura-mirá?
- Never use this instead of prescribed malaria prevention tablets, and never use it to treat a fever in a malaria area.
- Do not delay a malaria test because you have been drinking it.
- Do not use if you are pregnant or trying to become pregnant, as the effects on pregnancy are unknown.
- Do not use if you are breastfeeding.
- Do not give it to children.
- Do not use if you have kidney disease or are on dialysis.
- Do not use if you take a water pill (diuretic), lithium or digoxin, unless your doctor agrees.
- Avoid it if you have a blood disorder that breaks down red blood cells, such as a haemolytic anaemia.
- Avoid it for two weeks before planned surgery, because of effects on fluid and blood pressure.
- Do not use unlabelled bark from an unknown seller.
When should you see a doctor?
Get medical help the same day if you have fever, chills, headache or sweats after being in a malaria area. Do not wait, and say where you have travelled.
Stop the bark and see a doctor if you notice:
- Dark brown or red urine - Yellow skin or eyes - Vomiting that will not stop, or severe cramps - Dizziness or fainting when you stand - Rash, itching, or swelling of the lips, tongue or face - Much less urine than normal
Swelling of the face or trouble breathing is an emergency. Call emergency services.
Is saracura-mirá legal where you live?
In Brazil it is sold as a traditional plant product in markets and shops, and it is not an approved medicine.
In the United States, the European Union and the United Kingdom it is not licensed as a drug. Where it appears, it is sold as a supplement, which means no one checks that it works.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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