hwayeseok
Do not self-treat with hwayeseok
If this is an emergency
Some reactions to hwayeseok need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Who should avoid hwayeseok?
- Do not use if you are pregnant; it may harm you and the baby, and bleeding in pregnancy needs urgent medical care.
- Do not use if you are breastfeeding.
- Never give it to a child.
- Never use it to treat heavy or non-stop bleeding at home; call emergency services instead.
- Do not use if you take a blood thinner such as warfarin, apixaban, clopidogrel or aspirin.
- Do not use if you take digoxin (a heart drug) or a thiazide water pill such as hydrochlorothiazide.
- Do not use if you have kidney disease (kidneys that no longer clean the blood well) or have had kidney stones.
- Do not use if you have high blood calcium (hypercalcaemia, too much calcium in the blood).
- Do not use if you take antibiotics, thyroid tablets, bone tablets or iron, unless a pharmacist has checked the timing.
- Never breathe in the powder or grind the stone yourself; the dust may carry asbestos fibres, which cause cancer.
- Do not use a product unless the seller can show it was tested for lead, arsenic and asbestos.
- Do not put it on a wound that is deep, dirty, or will not close.
When should you see a doctor?
Call emergency services now if bleeding will not stop, if blood is soaking through pads or dressings, or if you feel faint, cold, grey or short of breath.
See a doctor the same day for any bleeding you cannot explain. That includes blood in vomit, stool or urine, and bleeding between periods or after the menopause.
Stop the powder and see a doctor if you feel sick, very thirsty or confused, or if you pass little urine. These can be signs of too much calcium in the blood.
Tell your doctor if you have taken it for more than a few days, so your lead level can be checked.
- What it is: A ground mineral, ophicalcite (marble with green serpentine), used in Korean medicine to try to slow bleeding.
- Active ingredients: Calcium carbonate (chalk), Serpentine (magnesium silicate), Trace iron, nickel and chromium
- Side effects: Constipation and stomach upset are common; long use risks high calcium, kidney stones and heavy metal build-up.
- Pregnancy & breastfeeding: Avoid in pregnancy and while breastfeeding.
Educational information, not medical advice — ask your doctor or midwife.
What is hwayeseok?
Hwayeseok is a mineral, not a plant. It is a stone called ophicalcite: marble mixed with green serpentine rock. Korean medicine grinds it to a fine powder and uses it to try to slow bleeding.
Healers gave it for heavy womb bleeding, bleeding after childbirth, nosebleeds and vomiting of blood. It was also dusted straight onto cuts.
The verdict on the evidence: it has a long record in East Asian medicine, but no human trials support it. A long history of use is not proof that something works, and that point applies to everything below. Raw serpentine rock can carry asbestos fibres and heavy metals, so the risks here are real and not just in theory.
How does hwayeseok work?
Nobody has shown how it works in people, and it may not work at all.
Most of the stone is calcium carbonate, the same chalk used in antacids (stomach acid tablets). Your body does need calcium to form a clot. But swallowed chalk has never been shown to stop bleeding inside the body.
On a cut, the dry powder may soak up fluid and form a crust. That is a guess based on how fine powders behave, not a tested result.
Korean and Chinese texts explain it in their own terms: a cool, heavy stone that settles blood and holds it in the vessels. That is a traditional idea, not a lab finding.
What forms does hwayeseok come in?
It comes as a grey-green stone, ground to a fine powder.
You may meet it as a raw powder, as a calcined (roasted, then ground) powder, or blended into pills and decoctions (boiled-water mixes). Healers also dusted the plain powder onto a wound.
It is not sold as a normal supplement in most countries. You would usually meet it inside a formula from a Korean medicine clinic.
Where it comes from:
It first appears in Chinese materia medica in the Song era, in the Jiayou Bencao of about 1060 CE.
Korean medicine took it up later. It is listed in the Donguibogam of 1613, Korea's best-known medical text, among drugs used to stop bleeding.
It stayed a minor, niche item. It was never a daily staple like ginseng, and it is rarely used today.
What does hwayeseok help with?
- Heavy menstrual bleeding: This is the main traditional use in Korean and Chinese texts, often as a powder in warm water or wine. No human trial has tested it. Heavy periods can have causes that need treatment, such as fibroids (growths in the womb) or a clotting problem, so see a doctor rather than self-treat.
- Bleeding after childbirth: Old texts list it for bleeding that keeps going after birth. This is a medical emergency today. There is no trial evidence, and delay can be fatal, so call for urgent help instead.
- Nosebleed: Traditional texts use the powder by mouth or in the nose. No trial supports this. Pinching the soft part of the nose for ten minutes works and costs nothing.
- Vomiting or coughing up blood: Listed in classical sources for bleeding from the stomach or lungs. Blood in vomit or in a cough points to a serious cause, such as an ulcer (a sore in the stomach lining). Get it checked the same day; no trial has tested hwayeseok for this.
- Bleeding from small cuts and grazes: The powder was dusted on wounds to dry and cap them. No trial has compared it with plain pressure and a clean dressing. Putting unsterile mineral powder in a wound can push in dirt and germs.
What are the side effects of hwayeseok?
- Constipation (hard stools)
- Upset stomach
- Feeling sick (nausea)
- Bloating and wind
- A chalky taste in the mouth
- Too much calcium in the blood, with long use
- Kidney stones (hard lumps in the kidney)
- Build-up of lead or arsenic, with long use
- Lung harm and cancer risk if you breathe the dust
- Infection if raw powder goes into a wound
Good to know:
Mild stomach upset is the most common problem. It tends to pass when you stop.
The serious risks come from long use and from the stone itself. Lead, arsenic and asbestos fibres may be in it. Over time these can harm the kidneys, the lungs and the blood.
Nobody has counted how often harm happens, because no trial has tracked it.
Options to discuss with a clinician
Bleeding has causes that can be identified, and the routes with real evidence behind them all start with a person — a doctor, pharmacist or registered herbalist — rather than a powder. None of the following is a swap; each is something to raise and be assessed for.
- **Bleeding after childbirth, or vomiting or coughing up blood:** these are emergencies, not home-remedy problems. Urgent medical assessment (999 in the UK, 911 in the US) is the only route here; there is no herbal option worth discussing first. - **Heavy menstrual bleeding:** worth a GP appointment to find the cause — fibroids (non-cancerous growths in the womb), hormonal changes or low iron are all treatable. Some people ask their clinician about **Stinging Nettle**; the evidence is modest and it interacts with blood-thinning medicines, so it is a conversation, not a self-prescription. - **Nosebleeds:** a pharmacist can show you correct pinch-and-lean first aid and check whether dryness or a medicine is the trigger. **Saline Nasal Rinse** or a **Neti Pot (Jala Neti)** may come up for dry, crusted passages. - **Small cuts and grazes:** cleaning and pressure, with **Honey** in medical-grade dressing form sometimes discussed with a nurse or pharmacist.
Graded pages for the options named above:
- Neti Pot (Jala Neti) — evidence grade A, traditional tier T3
- Saline Nasal Rinse — evidence grade A, traditional tier T3
- Stinging Nettle — evidence grade B, traditional tier T3
- Honey — evidence grade A, traditional tier T3
Review status
This page has not been signed off by a pharmacist and is not published. It is shown here for a policy decision only.