What is Eunsiho?

Eunsiho is the dried root of a small plant in the pink family. The plant is Stellaria dichotoma var.

lanceolata. In Korean herbal medicine it counts as a single herb.

You may see it used on its own. More often it sits inside a larger formula. Sellers in English often list it as Stellaria root.

Tradition treats it as a cooling herb. It is given for a low fever that keeps coming back in the late afternoon or at night. It is also given for night sweats, and for a hot feeling in the palms, soles and chest.

It is a classic pick for a child who runs a mild fever after a long illness. Such a child often eats poorly too. Herbalists pair it with other herbs far more often than they use it alone.

Here is the honest verdict up front. We could not find a single published human trial of Eunsiho. Its standing rests on long use, not on tested results.

Long use is not proof that something works. That caution applies to every claim on this page.

How does Eunsiho work?

Nobody has shown how Eunsiho works in the body. What follows is theory, not proven fact.

In Korean and Chinese theory, the root clears "deficiency heat". That means a slow, low heat that rises when the body is worn down by long illness.

That idea explains the way it is chosen. It suits evening fevers and night sweats. It is not used for the sudden fever of a new infection.

Lab and animal work offers a few hints. Extracts of Stellaria dichotoma have lowered signs of inflammation (swelling) in cell tests. Some rodent studies report a mild drop in fever.

Cell dishes and mice are a long way from people. These findings are a reason to study the herb, not a reason to trust it.

What forms does Eunsiho come in?

The traditional form is the sliced, dried root. It is simmered in water to make a strong tea, called a decoction.

You may also meet it as:

A fine powder, sometimes pressed into capsules.

A strong granule that you stir into hot water. This form is common in Korean and Taiwanese pharmacies.

A named part of a multi-herb formula, such as Cheonggolsan (Qing Gu San) or Cheonghobyeolgaptang (Qinghao Biejia Tang).

One point of quality matters more than the form. Cheaper roots, above all Gypsophila species, are known fakes sold under the same market name. So buy only from a seller who names Stellaria dichotoma on the label.

Where it comes from:

Eunsiho came into East Asian medicine fairly late. It was used around the Ming and Qing periods. It was carried into Korean practice from Chinese sources.

Before that, its market name was shared with Siho (Bupleurum root). Old texts took trouble to keep the two apart.

Siho was kept for fevers that swing hot and cold. Eunsiho was set aside for the quieter, wearing heat of long illness.

It is still a known single herb in Korean herbal pharmacies today. But it is a supporting player, not a headline herb.

What does Eunsiho help with?

• Low-grade fever that returns in the late afternoon or at night: This is the classic use, and it is the reason most Korean formulas include the root. Texts from the Ming period onward name it for fever that rises as the day ends in someone worn down by long illness. The human evidence is absent. We found no trial that measured temperature in people taking Eunsiho. A fever pattern like this needs a diagnosis first. Tuberculosis, blood disorders and some cancers show up this way, and an herb will not find them.
• Night sweats during a long illness or recovery: Tradition ranks night sweats as the second main reason to reach for this root, usually paired with other cooling herbs rather than used alone. No human trial has tested it for sweating. There is no laboratory work that explains how it might act on sweat glands either. Treat new or heavy night sweats as a symptom to get checked, not a symptom to self-treat.
• A hot feeling in the palms, soles and chest: Korean and Chinese texts describe this as "five-centre heat" and list Eunsiho among the herbs chosen for it. This is a traditional pattern, not a measurable condition in modern medicine, so no trial exists and none is likely soon. We report the traditional standing because it is real. We cannot report an effect, because it has not been shown.
• Mild fever with poor appetite in children after a long illness: Classical texts call this pattern "gan heat" and name the root for it specifically. It is one of the few paediatric uses attached to this herb. There is no trial evidence in children, and no safety data in children either. Do not act on this yourself. A child with an ongoing fever or poor appetite needs a doctor, and any herbal treatment should come from a qualified practitioner who has examined them.
• Dry mouth and thirst alongside long-term illness: This is a secondary traditional use, usually addressed by the wider formula rather than by Eunsiho on its own. No human study supports it. Ongoing thirst and a dry mouth can point to diabetes or a salivary gland problem, both of which need testing.

Which foods are rich in Eunsiho?

Eunsiho is a medicinal root, not a food, and it is not found in any normal diet.

What are the side effects of Eunsiho?

• Upset stomach or nausea, most often on an empty stomach
• Loose stools or mild diarrhoea
• Feeling cold or chilled, since the herb is a cooling one
• Reduced appetite in people whose digestion is already weak
• Skin rash or itching, which can signal an allergy
• Stomach irritation from products adulterated with Gypsophila root, which is higher in saponins

Good to know:

Reported side effects are mild and mostly involve the gut. Serious harm has not been recorded for correctly identified Stellaria dichotoma root.

That is partly a good sign and partly a gap. There is no formal safety monitoring for this herb, so mild effects may simply go unreported.

The bigger practical risk is buying the wrong root. Stop and get medical advice if you get stomach pain, a rash or dark urine after taking a product.

How much Eunsiho should you take?

• Recommended daily: No trial has set a safe or useful dose, so every number below comes from tradition rather than testing. Classical texts use 3 to 9 g of the dried root per day, simmered in water as a tea. The root is almost always combined with other herbs at these amounts. Granules and powders are concentrated to different strengths, so a gram of granule is not a gram of raw root. Follow the label on the product in front of you. If you are working with a Korean medicine practitioner, use the dose they give you and tell them about every drug and supplement you take.
• Best time of day: Traditional practice splits the daily amount into two doses, morning and early evening. Some practitioners shift the second dose to late afternoon, ahead of the time of day when the fever pattern tends to rise.
• With or without food: Take it after food. The root contains saponins, soap-like plant compounds that can unsettle an empty stomach.
• Time to effect: Unknown. No study has measured how fast it acts, or whether it acts at all. Traditional sources describe it as part of a course rather than a same-day remedy.
• How long to take it: Keep any trial of this herb short. Tradition uses it in bursts of one to two weeks while a fever pattern settles, not as a daily supplement. Reassess after two weeks. If nothing has changed, stop. See a doctor rather than extending the course if a fever, sweating or weight loss is still there after two weeks.