What is Keishibukuryogankayokuinin?

Keishibukuryogankayokuinin is a Japanese Kampo herbal formula. It is Keishibukuryogan (cinnamon and poria) with one extra herb, coix seed (yokuinin), added. In Japan it is used mainly for skin problems such as acne, rough or dull skin, and small warts, often in women who also have period pain.

It is on the Japanese Ministry of Health, Labour and Welfare list of 148 Kampo formulas approved for national health insurance. Doctors there prescribe it as a dried granule extract, most often under the product code TJ-125.

The honest verdict: this formula has a long and well-documented place in Japanese practice, but good human trials of it are very thin. Long use in a tradition is not the same as proof that it works, and that difference matters when you decide whether to try it.

How does Keishibukuryogankayokuinin work?

Kampo explains this formula through the idea of oketsu, or "blood stasis" — a pattern of sluggish circulation linked to dark period blood, cramps, cold feet with a flushed face, and dull skin. The formula is said to move that stagnation and clear heat and damp from the skin.

That is a traditional model, not a tested biological one. Laboratory work on single herbs in the mix suggests mild effects on blood flow markers and on inflammation (swelling and irritation). None of this has been shown to explain what happens in a person taking the whole formula.

Coix seed is the addition that points the formula at the skin. It has a separate folk reputation in Japan for warts and rough skin. That reputation rests on tradition and small case reports, not on solid trials.

What forms does Keishibukuryogankayokuinin come in?

In Japan the usual form is a dried extract granule or fine powder, sold in single-dose sachets. This is what doctors prescribe and what most research uses.

Other forms you may meet:

Tablets or capsules of the same extract, sold over the counter.

Loose raw herbs to be simmered into a decoction (a strong tea), mainly in traditional pharmacies.

Chinese-made versions of the base formula Guizhi Fuling Wan, sold as pills. These lack the coix seed and are not the same product.

Where it comes from:

The base formula, Guizhi Fuling Wan, comes from the Chinese classic Jingui Yaolue, written around the third century. It was used for masses and blood stasis in women.

Japanese Kampo doctors adopted it and later added coix seed to aim it at the skin. The modern granule version was standardised in the twentieth century and approved for insurance cover in Japan in 1986.

What does Keishibukuryogankayokuinin help with?

• Acne and pimples: This is the most common reason it is prescribed in Japan, especially for adult women whose spots flare around their period. Practitioners pick it when the person also shows the oketsu pattern (sluggish circulation). Published human trials are limited to small, mostly uncontrolled Japanese reports, so the evidence is weak even though use is widespread.
• Rough, dull or blotchy skin: Coix seed has a long folk reputation in Japan for smoothing rough skin, and the whole formula is chosen when dullness sits alongside period problems. Evidence here is traditional and anecdotal. No good controlled trial supports it.
• Small warts: Coix seed alone, sold as yokuinin, is a familiar over-the-counter wart remedy in Japan. Evidence is limited to case reports and small series, and warts often clear on their own, which makes such reports hard to read. Do not delay seeing a doctor about a skin growth that changes, bleeds or grows fast.
• Period pain and dark, clotted period blood: The base formula has been used for this for centuries and is still prescribed for it. Human evidence is thin and mostly from small Japanese studies of the base formula, not the coix version. Severe or worsening period pain needs a medical check, since it can point to conditions such as endometriosis (tissue like the womb lining growing outside the womb).
• Cold hands and feet with a flushed face: This mix of signs is a classic Kampo reason to choose the formula. It is a traditional matching rule, not a tested outcome. No trial has measured this.

Which foods are rich in Keishibukuryogankayokuinin?

1. Hatomugi (Job's tears) tea: a roasted drink made from the same coix seed used in the formula
2. Coix grain: cooked like barley in some East Asian dishes
3. Cinnamon bark: the culinary spice, from the same plant group as the formula's cinnamon

Practical Tips:

Eating these foods is not the same as taking the formula, and the doses are far smaller.

What are the side effects of Keishibukuryogankayokuinin?

• Upset stomach, nausea or loose stools
• Loss of appetite
• Heartburn
• Skin rash, redness or itching
• Rare liver injury, with yellow skin or eyes, dark urine, or deep tiredness
• Rare lung inflammation, with a dry cough, fever and breathlessness

Good to know:

Most people who take this formula have no trouble, and the common problems are mild stomach upset and loose stools. Peach kernel and moutan can be hard on a sensitive gut.

The serious reactions are rare but real. Liver injury and interstitial pneumonia (inflammation deep in the lung tissue) have been reported with Kampo formulas in general. Both need urgent medical attention, not a wait-and-see approach.

How much Keishibukuryogankayokuinin should you take?

• Recommended daily: The standard Japanese adult dose of the granule extract is 7.5 g a day, split into two or three doses. Packaged products list their own dose, and you should follow the label or your prescriber. Doses are usually lowered for older adults and for smaller people. There is no established dose for children outside medical supervision.
• Best time of day: Two or three times a day, spread across the day. Many Japanese prescribers say to take it before meals or between meals.
• With or without food: Traditionally taken on an empty stomach, about 30 minutes before food or between meals, with warm water. If it upsets your stomach, taking it with food is acceptable.
• Time to effect: Most people who notice anything notice it over 4 to 8 weeks. It is not a fast-acting remedy.
• How long to take it: Skin changes are slow, so a trial of 8 to 12 weeks is usual before judging it. If nothing has changed by then, stop and rethink rather than pushing on. Long runs of many months should be supervised. Stop and get advice if new symptoms appear at any point.