What is Shi Jun Zi?

Shi Jun Zi is the dried fruit of the Rangoon creeper vine. In Chinese medicine it is used to clear worms from the gut. It is also given to children who have worms along with a poor appetite.

It is a single herb, not a blend. You may see it sold as quisqualis fruit or Rangoon creeper fruit. The seed inside the fruit is the part most often used.

The proof here is thin. There are no good modern trials in people to show how well it works. Long use in a tradition is not the same thing as proof.

How does Shi Jun Zi work?

The old idea is simple. The herb is thought to stun worms in the gut, so they lose their grip and pass out in the stool.

Most of this comes from lab and animal work, not from people. A plant acid in the seed, quisqualic acid, is the part most often named.

That same acid acts on nerve cells in lab tests. This may be why large doses can cause hiccups, dizziness and, rarely, fits (seizures). We cannot say how well the herb works in people.

What forms does Shi Jun Zi come in?

The most common form is the dried, ripe fruit or just the seed kernel inside it. The kernel may be raw or dry-fried in a pan.

Dry-frying is the usual way to prepare it in China. Frying is said to soften the harsh side effects.

You may also find it as a powder, in pills, or mixed into a formula with other herbs. Whole fruit and kernel are the forms used most in clinics.

Where it comes from:

Shi Jun Zi shows up in Chinese texts of the Song era, about a thousand years ago. The Kai Bao Ben Cao lists it as a worm herb for children.

The vine grows across South and Southeast Asia. Folk healers in India and Burma have used the fruit for worms too.

In China it has stayed a staple worm herb ever since, mostly for young patients.

What does Shi Jun Zi help with?

• Roundworm in the gut: This is the main classical use. Chinese texts have named it a roundworm herb for a thousand years. Modern backing is weak. Lab work shows the seed extract can stun worms, but we found no sound trial in people. Standard worm medicine from a doctor has far better proof.
• Pinworm (threadworm) in the gut: Old texts also list it for pinworm, often with a second herb. Reports of success are case notes, not trials. Pinworm spreads easily in a household. If you think you have it, see a doctor. Cheap, well tested medicine exists.
• Poor appetite in children linked to worms: In Chinese medicine this pattern is called gan ji. A child eats poorly, looks thin and has a swollen belly. The herb was given to clear the worms so the child would eat again. There is no trial evidence for this use. A child who is losing weight needs a doctor, not a herb alone.

Which foods are rich in Shi Jun Zi?

You cannot get this herb from everyday food, and there is no need to.

What are the side effects of Shi Jun Zi?

• Hiccups, which can be strong and hard to stop
• Feeling sick or being sick
• Belly pain and loose, watery stools
• Dizziness
• Headache
• Skin rash
• With large doses: shaking, fainting and fits (seizures)

Good to know:

Mild side effects are common, and hiccups are the best known one. They usually pass once you stop the herb.

The serious effects come with large doses or with tea. Fits and fainting have been reported after overdose. This is why the dose and the tea rule matter so much.

How much Shi Jun Zi should you take?

• Recommended daily: No modern safe dose has been set. What follows is what classical texts say, not medical advice. Adults: about 6 to 12 g of the fruit a day, or 3 to 6 g of the kernel. Some texts cap it at 10 to 20 kernels. Children: about one kernel for each year of age, up to 10 kernels a day. Do not go past the amount your practitioner gives you. Large doses can cause fits (seizures).
• Best time of day: On an empty stomach, either first thing in the morning or at bedtime.
• With or without food: Take it on an empty stomach, away from meals. Do not drink tea with it or on the same day.
• Time to effect: If it works, worms may pass in the stool within one to three days.
• How long to take it: This is a short course herb, not a daily supplement. Classical use is one to three days in a row. If worms are still there, texts repeat the course after a week or two. Stop and get advice if nothing changes after two courses.