aceituno

What is aceituno?

Aceituno is the bitter bark of Simarouba glauca, a tree also called the paradise tree. It is used in Latin American folk practice as a gut and fever remedy. The seeds press into a mild cooking oil that is eaten as ordinary food.

The tree grows in Mexico, Central America, Cuba and northern South America. The bark is stripped, dried and brewed. You may also see capsules, tinctures and leaf powder sold online.

Here is the honest verdict. Human evidence for the bark itself is thin and dated. One purified compound from the tree was tested in people for amoebic dysentery many decades ago, with some success.

That old work does not transfer to a bag of bark or a capsule. Long traditional use is not proof that a remedy works. It is also not proof that it is safe.

How does aceituno work?

No one has shown, in good human trials, how aceituno bark acts in the body.

The bark holds bitter compounds called quassinoids. In test tubes, some of these slow the growth of Entamoeba histolytica, the parasite behind amoebic dysentery. In animal studies, one of them, glaucarubin, reduced that infection.

That is the strongest thread of science here. Even so, a lab dish is not a human gut. The dose and purity of a home-brewed bark tea are not known.

In cell studies, quassinoids from the tree also kill some cancer cells. This is very early work. It does not mean the bark treats cancer in people, and it should never replace cancer care.

The bark is intensely bitter. Bitter plants can trigger saliva and stomach juices, which may explain its old use as a stomach tonic. That effect is plausible but not proven for this plant.

At higher amounts the same compounds irritate the stomach and cause vomiting. So the line between a traditional dose and an unpleasant one appears to be narrow.

What forms does aceituno come in?

Aceituno reaches buyers in a few forms. Each one behaves differently.

Dried bark chips or powder, brewed as a tea or decoction.

Tinctures, where the bark is soaked in alcohol.

Capsules of powdered bark or leaf.

Leaf powder, sold mainly from Indian growers, where the tree was planted for its oil.

Aceituno seed oil, sold as a cooking oil or a soap and cosmetic base. This is a food product, not the herbal remedy.

Few of these products are tested for strength or purity. Labels rarely say how much quassinoid is present. Bark and leaf are not the same material, and the labels do not always make that clear.

Where it comes from:

Bitter simarouba bark has a long record in Latin American and Caribbean folk medicine.

It was brewed for dysentery, loose stools, fever and worms. Healers also used it as a bitter tonic for poor appetite. Washes of the bark were put on skin sores.

In the 1700s, bark from simarouba trees was shipped to Europe and used for dysentery outbreaks. Much of that trade bark came from the related tree Simarouba amara.

In the mid 1900s, chemists isolated glaucarubin and tried it in patients with amoebic dysentery. Safer and more reliable drugs later replaced it.

The tree carries a second history as a crop. It was planted in India from the 1960s for its seed oil and shade. That planting is farming, not medicine.

What does aceituno help with?

• Amoebic dysentery and parasite-related diarrhoea: This is the only use with real human data, and the data is old and indirect. Folk healers brewed the bark for bloody, griping diarrhoea. In the 1950s and 1960s, doctors gave patients glaucarubin, a single purified compound from the plant, and some cases of amoebic infection cleared. That is not the same as drinking bark tea. The dose was measured and the compound was pure. Modern drugs for amoebic dysentery are better studied and far more reliable. Amoebic dysentery can become dangerous. It needs a diagnosis and proper treatment, not a home brew.
• Ordinary diarrhoea and stomach upset: Traditional use is wide here, but human trials are absent. The bark's tannins are astringent, which may firm up loose stools. That idea comes from plant chemistry, not from trials of this remedy. The same bark causes nausea and vomiting at higher amounts. So it can make an upset stomach worse rather than better.
• Fever, including malarial fever in folk use: Tradition is strong, evidence in people is missing. Bitter barks were a standard fever remedy across the tropics. In lab tests, some quassinoids slow malaria parasites. Whether that happens in a person taking bark tea has not been shown. Malaria is a medical emergency in many regions. Do not treat a fever that may be malaria with a herb.
• Poor appetite, as a bitter tonic: Plausible, untested for this plant. Bitter taste can prompt saliva and stomach juices in people. That general effect is known for bitters as a group. No trial has measured appetite in people taking aceituno. Many gentler bitters are better studied.
• Intestinal worms: A long-standing folk use with no human trials behind it. Some quassinoids act against parasites in test tubes and in animals. Worm infections are easy to identify with a stool test and are treated well by standard medicines.
• Skin sores, used as an external wash: Traditional only. A cooled bark wash was applied to sores and rashes. There are no human studies of this use, and no data on how the skin reacts to repeated use. An infected or spreading sore needs a doctor.

Which foods are rich in aceituno?

The bitter compounds are not found in everyday foods. The seed oil of this tree is eaten as a cooking oil in parts of Central America and India, but it holds almost none of the bitter bark compounds. Eating that oil is not the same as taking the remedy.

What are the side effects of aceituno?

• Nausea
• Vomiting, especially at higher amounts
• Stomach cramps
• Loss of appetite
• Loose stools, or sometimes constipation
• A strong bitter taste that lingers
• Skin rash or itching, in people allergic to the plant family

Good to know:

Nausea and vomiting are the common problems, and they are dose-related.

The bitter compounds in this bark irritate the stomach. In older human work with the purified compound, stomach upset was the main complaint. Strong brews can make a person vomit outright.

Serious harm has not been well documented, but that is partly because the plant has barely been studied in people. Absence of reports is not the same as proof of safety.

Stop taking it if vomiting starts. Repeated vomiting can dehydrate you, which is risky when you already have diarrhoea.

How much aceituno should you take?

• Recommended daily: There is no well-established dose for aceituno bark, and this page does not set one for you. Labels on dried bark often list about 1 to 2 grams brewed as a cup of tea, once or twice a day. Capsule labels vary widely. Tincture labels usually give drops rather than grams. These label figures come from custom, not from dose-finding studies. Quassinoid content changes from batch to batch, so the same measure can be stronger or weaker. More is not better here. Larger amounts of this bark reliably cause nausea and vomiting. Anyone considering it should ask a doctor or pharmacist first.
• Best time of day: Timing has not been studied and probably matters little. As a bitter tonic for appetite, bitters are usually taken shortly before a meal. For gut complaints, people traditionally took it through the day. If it makes you queasy, time of day will not fix that.
• With or without food: Taking it with food may cut the nausea that this bark often causes. Strong bitters on an empty stomach are more likely to trigger vomiting. Food blunts that. If you are using it as a bitter for appetite, tradition puts it before food instead. Either way, stop if you feel sick.
• Time to effect: Honest answer: it may do nothing at all. If an effect is going to show for diarrhoea, people describe it within a day or two. Appetite effects from bitters, if any, are felt in minutes. No trial has measured time to effect for this bark. If your symptoms are worsening, stop waiting and get medical care.
• How long to take it: No safe long-term period has been studied. In tradition, the bark was taken for a short course during an illness, not daily for months. There is no safety data on long use in people. If you take it at all, keep it short, and stop if symptoms do not settle within a few days.