What is He Shi?

He Shi is the dried ripe fruit of Carpesium abrotanoides, a plant in the daisy family. Chinese medicine uses it for one main job. That job is to expel worms from the gut.

Worms here means parasites that live in the gut. In English the herb is sometimes sold as carpesium fruit or common carpesium fruit.

It is a short-course herb, not a daily tonic. Tradition uses it for a day or two at a time. A laxative often follows, to help clear the gut.

A practitioner always sets the dose.

The evidence is worth knowing up front. He Shi has a long record inside one tradition. But we could not find any published human trials of it.

Long use tells you that people have relied on something. On its own, that does not prove it works. Modern worm medicines have been tested in people, and this herb has not.

How does He Shi work?

The traditional idea is simple. He Shi is thought to be toxic to worms in the gut. It is said to irritate them.

The worms then lose their grip on the gut wall. They pass out in the stool.

Lab work points to sesquiterpene lactones as the likely actors. These are bitter plant compounds. In test-tube and animal studies, extracts have shown activity against several parasites.

How well that carries over to a person is unknown. A person swallows a decoction, which is a tea boiled from the herb.

No human study confirms how the herb works. None shows what dose is needed. None shows how much of the active material your body takes in.

What forms does He Shi come in?

He Shi is almost always sold as a raw crude herb. It is used in short courses.

- Whole or crushed dried fruit, simmered into a decoction (a tea boiled from the herb) - Fine powder, taken in a small measured dose - Pills or boluses made from the powder in traditional formulas - Sometimes part of a ready-made deworming formula

It is not a common ingredient in Western-style capsules or tinctures. It is not sold as a food or a daily supplement.

Where it comes from:

He Shi shows up in Chinese herb books from the Tang dynasty on. The Ming dynasty Ben Cao Gang Mu lists it. For centuries it has been grouped with the worm-expelling herbs.

Classical texts pair it with herbs such as Shi Jun Zi and Ku Lian Pi. They warn that it is harsh. It is for short use, not for taking often.

That caution is part of the tradition itself. It is not a modern add-on.

What does He Shi help with?

• Intestinal roundworm infection: This is the classic main use. Old texts describe a short course to expel roundworms. A laxative usually follows. We found no published human trial of He Shi for roundworm. So the support here is traditional, not clinical. Doctors now treat roundworm with prescription drugs that have been tested in people.
• Intestinal pinworm infection: Tradition uses He Shi for pinworm. It is sometimes paired with other worm-expelling herbs. Lab work shows extracts can be toxic to parasites in a dish. No trial shows the same thing in a human gut at a safe dose.
• Tapeworm and hookworm (traditional use): Chinese sources list these among the worms He Shi was used against. It was used in mixed formulas, rather than alone. There is no human trial evidence. Tapeworm needs a firm diagnosis and proper medical care. Treatment that is not complete can let the infection go on.
• Belly pain linked to worms in traditional practice: In the past, cramping belly pain was one signal to use this herb. That was when a person was thought to have worms. Belly pain has many causes. Most have nothing to do with parasites. Pain that keeps coming back needs a diagnosis, not a deworming herb.
• Poor appetite in children blamed on worms in traditional practice: Old texts describe children with poor appetite, a swollen belly and worms. They list He Shi among the treatments. There is no modern evidence for this use. The herb carries a real risk of vomiting and dizziness. That risk matters more in a small body. Do not give it to a child on your own judgement.

Which foods are rich in He Shi?

He Shi is a medicinal herb, not a food, and its active compounds are not found in anything you would normally eat.

What are the side effects of He Shi?

• Nausea
• Vomiting
• Belly pain and cramping
• Diarrhoea
• Dizziness
• Headache
• Dry mouth
• Feeling weak or unsteady
• Rash or itching in people sensitive to daisy-family plants

Good to know:

Stomach upset is the common problem, and it is reported often enough that traditional texts build a warning into the herb's description.

Chinese sources also record dizziness, headache and weakness, mostly when the dose is too high. These are signs to stop and get advice, not to push through.

Because He Shi is used in short bursts rather than daily, long-term safety in people has not been studied at all. Nobody can tell you what repeated courses do over years.

How much He Shi should you take?

• Recommended daily: No dose has been established by modern research. What follows is what Chinese pharmacopoeia texts record, not a recommendation to self-treat. - Decoction: about 3 to 9 g of the dried fruit per day - Powder: about 1.5 to 3 g per dose The gap between a traditional dose and a dose that makes people sick is not well mapped. This herb should only be used with a qualified practitioner who can check the dose and confirm that worms are actually the problem.
• Best time of day: Traditionally taken in the morning on an empty stomach, so the herb meets the worms rather than a meal. A laxative is sometimes given afterwards to help clear the gut.
• With or without food: Traditionally on an empty stomach. This also makes nausea more likely, which is one reason the herb is used under supervision rather than self-prescribed.
• Time to effect: If it works as tradition describes, worms would be expected to pass in the stool within a day or two. This timeline comes from traditional accounts, not from measured trial results.
• How long to take it: Short courses only. Traditional use is typically one to three days, then stop. He Shi is not a herb you take for weeks. If nothing changes after a single short course, stop and get a stool test rather than repeating or raising the dose.