What is Likucha?

Likucha is the bark, heartwood and fruit of Artocarpus lakoocha, a large tree of India and South-East Asia. It is also called monkey jack. In Ayurveda it is used as a single drug, most often to clear worms from the gut.

The best known form is a dried water extract of the heartwood. Thai medicine calls the same extract puag-haad and uses it for tapeworm. The ripe fruit is eaten as food and made into chutney and pickle.

Here is the plain verdict. The traditional record is long and steady, but good human trials are missing, so we cannot say how well it works in people. A long history of use is not proof of effect, and that point is made once here rather than repeated in every section below.

How does Likucha work?

The short answer is that nobody has proved how it works in people.

The heartwood is rich in oxyresveratrol, a plant compound related to resveratrol found in grapes. In lab dishes this compound damages the outer layer of tapeworms and roundworms. Whether enough of it reaches a worm inside a human gut is not settled.

The same compound blocks tyrosinase, the body enzyme (a protein that speeds up a reaction) that makes skin pigment. That is why creams made from the wood are sold for dark patches on the skin.

Lab tests also show it mops up free radicals, which are unstable particles that can damage cells. Test-tube results like these often do not carry over to the human body.

What forms does Likucha come in?

The traditional worm remedy is a dried water extract of the heartwood, sold as a coarse brown powder. In Thailand it is called puag-haad. It is usually given as a single dose stirred into water.

Other forms you may meet include dried bark powder, bark decoctions (simmered water drinks) and creams or serums made for dark skin patches.

The ripe fruit is a food, not a medicine dose. It is eaten fresh, dried, or made into chutney and pickle.

Where it comes from:

Likucha appears in classical Ayurvedic texts as a sour fruit and as a wood used against worms in the gut. Folk healers across northern and eastern India used the bark for stomach complaints and skin problems. In Thai traditional medicine the same heartwood extract, puag-haad, has been a standard tapeworm remedy for generations, usually followed by a laxative to clear the worm out.

What does Likucha help with?

• Tapeworm and other gut worms: This is the main traditional use and the one with the most lab support. Test-tube and animal work shows the heartwood extract can damage worms. We could not find a published human trial that settles how well it works or how safe it is against modern worm medicines.
• Dark patches on the skin (used on the skin): Creams made from the heartwood block the enzyme that makes skin pigment in lab tests. Small cosmetic studies have been reported by makers of these creams, but we could not confirm an independent trial. Treat this as unproven.
• Loose stools and gut upset (traditional use): Bark decoctions were used for diarrhoea and stomach pain in folk practice, probably because of the tannins, which are astringent compounds that tighten tissue. There is no human trial evidence for this use.
• Minor skin irritation (used on the skin): The bark paste was applied to sores and itchy skin in traditional practice. Lab work shows some anti-inflammatory and antioxidant activity. No human trials support this use, and broken skin should be seen by a doctor.

Which foods are rich in Likucha?

1. Ripe monkey jack fruit: eaten fresh in India, Nepal and Thailand
2. Lakoocha chutney and pickle: made from the sour unripe fruit
3. Dried fruit slices: used as a sour flavouring in curries
4. Roasted seeds: eaten as a snack in some regions

Practical Tips:

Eating the fruit as food is not the same as taking the concentrated heartwood extract used as a remedy.

What are the side effects of Likucha?

• Nausea
• Vomiting
• Loose stools or diarrhoea
• Stomach cramps
• Dizziness or feeling faint after the dose
• Dry mouth
• Redness, stinging or itching where a cream is applied
• Rash or swelling in people allergic to jackfruit, breadfruit or the tree's milky sap

Good to know:

Most reported problems are gut upset from the strong single dose and the laxative that follows it. These usually settle within a day.

The bigger risks come from the treatment routine rather than the plant itself. A strong laxative can leave you short of fluid, which matters most for children, older people and anyone already unwell.

Because safety has not been tested properly in people, unknown effects are possible. Stop and get advice if anything feels wrong.

How much Likucha should you take?

• Recommended daily: There is no safe dose established by modern research. Do not treat the figures below as a recommendation. In traditional Thai and Indian practice, the heartwood extract is given as a single dose of roughly 3 to 8 grams stirred into water, followed hours later by a laxative. This is done by a trained practitioner, not at home. The ripe fruit eaten as food needs no dose limit for most people.
• Best time of day: The traditional worm dose is taken in the morning on an empty stomach, with a laxative given later the same day. Skin creams are usually applied at night.
• With or without food: The traditional worm dose is taken on an empty stomach with plenty of water. The fruit is simply eaten as food.
• Time to effect: For the traditional worm use, any effect is meant to show within a day, once the bowel is cleared. For skin creams, makers claim several weeks, but this is not proven in independent trials.
• How long to take it: The traditional worm dose is a single dose, not a daily course. Do not repeat it on your own. If worms or worm segments still appear in your stool after treatment, see a doctor rather than taking more.