What is Kyukichoketsuin?

Kyukichoketsuin is a Japanese Kampo herbal formula, a fixed blend of 13 dried herbs taken as extract granules or as a tea-like decoction (a strained herb brew). In Japan it is used mainly in the weeks after childbirth, for tiredness, low mood, lingering bleeding and lower belly pain. The name is the romanised Japanese reading of the characters written in Chinese as Xiong Gui Tiao Xue Yin.

It is one of the 148 Kampo formulas approved by Japan's Ministry of Health, Labour and Welfare (MHLW) for prescribing under national health insurance. That means a Japanese doctor can prescribe it and the granules are made to a set standard. Outside Japan it is sold as a supplement, with no such standard behind it.

Evidence verdict: the formula has a long, documented place in Kampo practice, but good human trial evidence for it is essentially missing. Long traditional use is not proof that something works, and that applies to everything said below.

How does Kyukichoketsuin work?

Honestly, nobody has shown how it works in a person, and the traditional explanation is not a biological one.

In Kampo terms, the formula is said to move "stagnant blood" (oketsu), warm the body and settle the digestion after childbirth. That is a traditional way of grouping symptoms, not a description of chemistry.

Laboratory and animal studies on the separate herbs report effects on blood vessels, clotting, inflammation and gut movement. None of that has been tested as a whole formula in a proper human trial, so treat any mechanism story as unproven.

One effect is well established, and it is not a benefit. The licorice in the blend can cause the body to hold sodium and lose potassium, which raises blood pressure and can cause swelling.

What forms does Kyukichoketsuin come in?

Most people take it as a dried extract granule that dissolves in hot water.

The main forms are:

Extract granules or fine powder in single-dose sachets — the standard prescription form in Japan.

Tablets or capsules of the same extract, sold as supplements.

Raw sliced herbs, weighed out and simmered into a decoction (a strained herb brew) by a Kampo practitioner.

Outside Japan, the amount of herb per dose can vary a lot between brands. Check that the label lists all the herbs and the extract weight per day.

Where it comes from:

The formula comes from the Ming dynasty Chinese text Wanbing Huichun ("Restoring Health from the Myriad Diseases"), published in 1587 by Gong Tingxian.

Japanese Kampo doctors adopted it and it became a standard postpartum prescription there. It sits on the MHLW list of 148 insurance-approved Kampo formulas, so it is still prescribed in Japan today.

Its standing is strongest in Japan. It is far less used in Chinese herbal practice today and is little known elsewhere.

What does Kyukichoketsuin help with?

• Recovery in the weeks after childbirth: This is the formula's classic use in Kampo, and it is the reason it is on the Japanese insurance list. We could not find a controlled human trial testing whether it speeds recovery. Tell your midwife or doctor before taking anything in this period, especially if you are breastfeeding.
• Tiredness and low mood after childbirth: Traditional Kampo texts describe it for the flat, drained feeling some people have after giving birth. There is no trial evidence that it helps mood. Low mood after childbirth can be serious and needs proper assessment, not a herb on its own.
• Bleeding that drags on after childbirth: Tradition uses it where bleeding continues longer than expected. Heavy or prolonged bleeding after childbirth can signal a medical problem, so it must be checked by a doctor first. Do not use a herb to wait out bleeding that is soaking pads or getting worse.
• Lower belly pain and cramping after childbirth: The blend includes herbs traditionally used to ease cramping pain and warm the lower abdomen. Human evidence for this specific use is missing. Pain with fever or bad-smelling discharge needs urgent medical review, because it can mean infection.
• Painful or irregular periods: Some Kampo practitioners use it outside the postpartum setting for period pain linked to the traditional pattern of "stagnant blood". This is an extension of traditional practice rather than a tested use. Other Kampo formulas are far more commonly chosen for period problems.
• Feeling cold with tiredness, in Kampo terms: The formula contains warming herbs such as dried ginger, and tradition selects it for people who feel cold and weak. "Cold" here is a traditional pattern, not a diagnosis. Persistent cold intolerance and fatigue can be caused by anaemia (low iron in the blood) or thyroid problems and should be tested for.

Which foods are rich in Kyukichoketsuin?

1. Licorice sweets and licorice tea: the same glycyrrhizin that makes the formula risky, so they add to the total
2. Dried ginger: a culinary version of Kankyo, one of the herbs in the blend
3. Jujube (red dates): eaten as food across East Asia and used here as Taiso
4. Dried citrus peel: the kitchen form of Chinpi

Practical Tips:

Kyukichoketsuin is a medicine, not a nutrient, so no food supplies it; keep licorice foods low while you take it.

What are the side effects of Kyukichoketsuin?

• Nausea, stomach upset or loss of appetite
• Loose stools or diarrhoea
• Skin rash, itching or redness
• Swelling of the ankles, hands or face from held fluid
• Unexplained weight gain over a few days, from held fluid
• Rising blood pressure
• Low potassium, which can cause muscle weakness, cramps and tiredness
• Irregular or pounding heartbeat, if potassium falls far enough
• Rare reports of liver inflammation with Kampo formulas in general, causing yellow skin or eyes, dark urine and deep tiredness

Good to know:

Most people who take it for a short course have no trouble, and the common complaints are stomach upset or a rash.

The effect that matters is from Kanzo (licorice). It can cause pseudoaldosteronism (a licorice reaction that makes the body hold salt and lose potassium), leading to swelling, high blood pressure, muscle weakness and, rarely, dangerous heart rhythms. This is well documented in people taking licorice-containing Kampo formulas.

Risk goes up with higher doses, longer use, older age, and taking other licorice products at the same time.

How much Kyukichoketsuin should you take?

• Recommended daily: In Japan the usual adult dose of the prescription extract granule is about 7.5 g of extract per day, split into two or three doses. No dose has been established outside that system, and supplement brands vary. Follow the label on the product you actually have, or the dose your practitioner sets. Do not take it alongside another licorice-containing Kampo formula unless a doctor has added up the total licorice for you.
• Best time of day: Spread the daily amount over two or three doses, morning, midday and evening. Kampo granules are usually taken before or between meals, with hot water.
• With or without food: Traditionally taken on an empty stomach, about 30 minutes before a meal or between meals. If it upsets your stomach, taking it with food is acceptable.
• Time to effect: Kampo practitioners generally expect some change within one to two weeks. Because there are no trials, we cannot tell you how likely any change is.
• How long to take it: Short courses are the norm. In postpartum use it is typically taken for a few weeks, not months. Reassess after two to four weeks. If nothing has changed by then, stop and get the problem looked at properly. Long or repeated use raises the risk from the licorice in the blend. If you take it for more than about four weeks, ask your doctor to check your blood pressure and potassium level.