What is Pageukcheon?

Pageukcheon is the dried root of a plant named Morinda officinalis. In Korean herbal medicine it is a warming tonic. It is used most often for a weak, achy low back and knees.

Older texts also use it for low sex drive, trouble getting pregnant, light or missed periods, and joints that ache in cold, damp weather. It is almost always cooked into a mix with other herbs. It is rarely used on its own.

Here is the plain verdict. The root has a long, solid place in East Asian herb books, but the human proof is very thin.

Nearly all the research is in test tubes and in rats and mice. We could not find a good human trial for any of its uses.

So treat what follows as old custom, not proven fact. A long history of use is not the same as proof that it works. This point is made once here, and not repeated in every section below.

How does Pageukcheon work?

Short answer: no one knows. No human study has shown what this root does inside the body.

Korean and Chinese medicine say it warms the kidney and lifts yang, the body's inner warmth and drive. That is a way of sorting symptoms into groups. It is not a body process you can measure in a lab.

Lab and animal work gives a few hints. Some parts of the root seem to act a bit like estrogen, a sex hormone. Other parts calmed swelling or slowed bone loss in rats.

None of that has been repeated in people. A hint in a rat is a reason to study something, not a reason to trust it.

What forms does Pageukcheon come in?

You will most often see it as dried, sliced root. This is boiled with other herbs into a strong tea, called a decoction.

Other common forms are ground powder, capsules and tablets, liquid tinctures in alcohol, and root soaked in rice wine.

Note that the skin is often stripped off and the woody core pulled out before use. Some sellers swap in cheaper look-alike roots, so buy from a shop you trust.

Where it comes from:

The root has been used in China for around 2,000 years, where it is called Ba Ji Tian. It appears in the oldest Chinese herb book, the Shennong Bencao Jing.

Korean medicine took it up and lists it as Pageukcheon in the Donguibogam, a Korean medical text from 1613. It sits in the group of warming kidney tonics.

It is still a common item in Korean and Chinese herb shops today.

What does Pageukcheon help with?

• Weak, aching low back and knees: This is the classic use, and it shows up in almost every Korean and Chinese herb book. The root is nearly always mixed with others, such as Dusung or Gugija. No human trial has tested the root alone for back or knee pain.
• Low sex drive and erection problems: Old texts list this as a main use for men. The proof stops there. Some rat studies report higher testosterone and more mating, but that has not been shown in men. See a doctor first, since erection trouble can be an early sign of heart or blood vessel disease.
• Trouble getting pregnant: Tradition uses it for a 'cold womb' and for couples trying to conceive. There is no human trial to support this. Fertility problems need a proper check-up, as many causes are treatable.
• Light, late or missed periods: Used in old formulas for periods that are scant, late or painful, along with cold hands and feet. Human evidence is missing. Sudden changes to your cycle should be checked by a doctor.
• Joint pain in cold, damp weather: Korean practice sees this root as warming and drying, so it is added to mixes for stiff, cold joints. Rat studies show less joint swelling. No human trial has been done.
• Bone thinning after menopause: This is the most studied idea in the lab. In rats with their ovaries removed, extracts slowed bone loss. Whether it protects human bone is unknown, and proven bone drugs exist. Do not swap a prescribed bone medicine for this root.
• Low mood and tiredness: Some Chinese lab work looks at the root's plant sugars for low mood in mice. This is early animal work only. Low mood that lasts more than two weeks needs real care, not a herb.

Which foods are rich in Pageukcheon?

1. Herbal wine: the sliced root is soaked in rice wine or soju in Korean home practice
2. Herbal chicken soup: the root is sometimes simmered with chicken and other tonic herbs
3. Noni fruit: from a cousin plant, Morinda citrifolia, but a different herb and not a swap for this one

Practical Tips:

No everyday food contains this root; you only meet it in herbal tea, soup or wine.

What are the side effects of Pageukcheon?

• Loose stools or mild diarrhoea
• Upset stomach or belly cramps
• Dry mouth and feeling too warm
• Trouble falling asleep if taken late
• Headache
• Skin rash or itching, rarely
• Unknown effects on hormones, based on animal work

Good to know:

Most reports say it is well tolerated at normal amounts. The usual complaints are mild gut upset and loose stools, and they settle when you stop.

Be honest about the gap, though. There is no long safety record from proper studies, so rare harms may simply never have been counted.

Stop taking it and speak to a doctor if you get a rash, swelling, or belly pain that does not go away.

How much Pageukcheon should you take?

• Recommended daily: No safe, tested dose has been set by any trial, because the trials have not been done. In Korean and Chinese practice, herbalists use about 6 to 15 grams of dried root per day, boiled into a tea with other herbs. Powders and capsules use far less, and every brand differs. Follow the label on the product, or the advice of a trained Korean medicine practitioner. Do not take more than the label says.
• Best time of day: Most often taken in the morning and again in the early evening, in two split doses. Some people find it too warming at night. If it keeps you awake, take it earlier in the day.
• With or without food: Take it with or just after food. Food lowers the chance of an upset stomach or loose stools, which are the most common complaints.
• Time to effect: Old practice expects slow change over 2 to 4 weeks. No trial has ever measured how fast it works, so this is custom, not data. It is not a quick fix for pain.
• How long to take it: Tradition uses it in courses of a few weeks to a few months, not forever. A sensible plan is to stop after 8 weeks and look at how you feel. If nothing has changed, stop for good. No study has looked at long-term safety, so years of daily use is not backed by anything.