Educational information, not medical advice — ask your doctor or midwife.
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Bireum, also written hyeon, is the Korean name for amaranth greens (Amaranthus tricolor). It is a soft-leaved summer vegetable eaten as a cooked side dish called namul. In Korean home cooking and folk practice it is treated as a cooling food that is easy on the stomach and the bowels.
People eat it mainly as everyday food. In folk use it is also given for sluggish bowels, for hot weather tiredness, and as a nourishing green for people who are run down. The leaves are a good source of iron, calcium, folate and vitamin C.
Evidence verdict: no human trials have tested bireum as a treatment, so its real value is as a nutritious vegetable rather than a proven remedy. Long traditional use does not prove that a plant works. That point applies to every section below, and this document says it once here.
No one has shown how bireum works as a medicine, because it has not been tested that way in people. What we do know is what it contains. It is a watery, high-fibre green carrying iron, calcium, folate, vitamin C, vitamin K and red-purple plant pigments called betacyanins.
The water and fibre are the likely reason folk use links it to easier bowel movements. In test tubes and in animals, amaranth leaf extracts soak up free radicals (unstable molecules that can damage cells). That kind of lab result does not tell us what a plate of cooked greens does in a person.
Korean folk thinking describes bireum as a cool, damp-clearing food used in hot months. That is a traditional way of sorting foods, not a measured body process.
Fresh young leaves and stems are the usual form, sold in summer markets in Korea and across Asia.
The common kitchen forms are blanched namul dressed with sesame oil, soybean paste and garlic; leaves stirred into soup or porridge; and leaves quickly fried with garlic. Dried leaf and leaf powder are sold for tea or for mixing into food, though they are far less common.
Amaranth grain and amaranth seed flour come from related plants and are a different product. Folk topical use involves crushed fresh leaves laid on the skin.
Amaranth has been grown as a leaf vegetable in East Asia for well over a thousand years. The name hyeon appears in classical East Asian herb and food texts, where the leaf is listed as a cooling food and the seed as a separate item.
In Korea it became a summer namul staple and a famine-time green that grows fast in poor soil. Its standing is mainly as food, with mild folk uses attached to it rather than a formal medicine role.
See a doctor if you get sharp pain in your back or side, blood in your urine, or pain when you pass urine, as these can be signs of a kidney stone. Get help the same day if your bowel habit changes for more than two weeks, if you have ongoing belly pain, or if you are very tired and pale despite eating well. Call emergency services if you get swelling of the lips, tongue or throat, a spreading rash or trouble breathing after eating it. If you take warfarin, contact your anticoagulation clinic if you have started eating leafy greens far more or far less than usual.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Bireum (hyeon) is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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