What is Hwalseok?

Hwalseok is the Korean name for talc. Talc is a soft white rock. It is ground and washed to make a fine powder that is used as a medicine.

Korean medicine uses it for hot, painful peeing and for summer heat with thirst. It is also used for watery stool, and dusted on the skin for heat rash. It is almost always mixed with other herbs, not used on its own.

The proof is thin. No good human trial has tested talc taken by mouth for any of these problems. A long past in tradition is not proof that it works.

Talc is a mineral, not a plant. Raw talc from the ground can hold other minerals, some of them harmful. Only washed, tested, medicine-grade talc should ever be used.

How does Hwalseok work?

No one has shown how Hwalseok works in the body. What follows is an idea, not a proven fact.

Talc does not melt in water. It passes through the gut mostly unchanged, and very little of it gets into the blood. So any effect is likely to be physical rather than chemical.

In the gut, the fine powder can soak up water and coat the lining. That may be why old texts used it for watery stool. On the skin, it dries damp spots and cuts down rubbing.

Korean and Chinese texts say Hwalseok "drains damp heat" and "frees the water paths". In plain words, healers thought it cooled the body and helped urine flow. Those are ideas from the old system of thought, not lab findings.

What forms does Hwalseok come in?

Hwalseok comes as a fine white powder, and that is the base for every other form.

In a herbal tea, the powder is tied in a cloth bag before boiling. Talc does not melt, so the bag stops grit from ending up in the cup.

In a dry powder blend, it is mixed with herbs and stirred into warm water. The best known blend is Yukilsan (six-to-one powder), which is six parts talc to one part licorice.

On the skin, plain or blended talc is dusted on damp, hot rashes. Many baby powders are also talc, but dusting a baby is not safe.

Talc also turns up as a filler in some pills and foods. That is a food use, not a medical dose.

Where it comes from:

Talc has one of the longest records of any mineral drug in East Asia. It appears in the Han-era Chinese herb classic, the Shennong Bencao Jing, and stayed in use for close to two thousand years.

Korean doctors took it up early. It is listed in the Donguibogam of 1613, Korea's best known medical text, for hot urine, summer heat and damp rashes.

In Sasang medicine, the Korean system that sorts people into four body types, Hwalseok is grouped with the Soyangin type. Soyangin people were seen as running hot and dry, so a cooling mineral was thought to suit them.

What does Hwalseok help with?

• Hot, painful or burning urine: This is the main old use, and it is the reason most Korean formulas include it. No human trial has tested talc for it. Burning urine is often a bladder infection, which can spread to the kidneys. See a doctor rather than treating it yourself.
• Summer heat with thirst and little urine: Old texts used Yukilsan (talc with licorice) for heat, thirst and dark scanty urine in hot weather. There is no trial to back this. Heat illness can turn serious fast. Cool water, shade and salts are the tested steps; talc is not.
• Watery diarrhea: Talc soaks up water, and that may be why old books used it for loose, watery stool. Nobody has tested this in people. The main risk with diarrhea is losing too much fluid. Oral rehydration salts are proven; talc is not.
• Heat rash and damp skin folds: Dusting talc on a damp rash keeps skin dry and cuts rubbing. This is a simple physical effect, not a healing one. Never dust it on a baby or near anyone's face, and never on broken skin. Breathing in the powder can harm the lungs.

Which foods are rich in Hwalseok?

1. Chewing gum and some hard candy: talc is used as a coating and to stop sticking
2. Some pills and supplements: talc keeps the powder from clumping
3. Polished rice: some mills once coated grains with talc to make them shine

Practical Tips:

These amounts are tiny and are not a treatment. You do not need talc from food.

What are the side effects of Hwalseok?

• Dry mouth and thirst
• Upset stomach or less appetite
• Constipation (hard, slow stools)
• Feeling weak, dizzy or tired if you lose too much fluid
• Coughing, wheezing or trouble breathing if you breathe in the powder
• Dry or itchy skin where the powder is dusted
• Long-term lung scarring and cancer from talc that holds asbestos (a harmful mineral fibre)

Good to know:

Most short-term problems are mild: dry mouth, a sour stomach or hard stools.

The serious risks come from the powder itself, not the dose. Breathing it in can hurt the lungs, and babies have died after breathing in loose talc powder. Talc that was never tested for asbestos carries a cancer risk that you cannot see or taste.

Studies of women who dusted talc on the genital area have raised worry about ovarian cancer (cancer of the egg sacs). The findings do not all agree, but it is reason enough not to use it there.

How much Hwalseok should you take?

• Recommended daily: There is no dose proven to work, because no human trial has set one. Every amount below comes from tradition, not from research. Korean and Chinese texts use about 6 g to 12 g a day of the washed powder, tied in a cloth bag and boiled with other herbs. In dry blends such as Yukilsan, a single serve is often 1 g to 3 g stirred into warm water. On the skin, a light dusting on a dry, unbroken rash is enough. Never use talc by mouth or on skin for a baby or young child. This is a mineral drug that Korean practice treats as something a trained practitioner prescribes. Do not start it on your own.
• Best time of day: Usually spread across the day, taken warm, in two or three servings. There is no evidence that one time of day works better than another. Avoid taking it late at night, since it is used to make you pass more urine and may wake you.
• With or without food: Usually taken between meals with warm water. Take it away from other medicines: at least two hours before or after, because talc can soak up drugs in the gut. If it upsets your stomach, take it with a little food.
• Time to effect: Tradition expects a change within a day or two for heat, thirst or loose stool. On the skin, the drying feel is right away. No study has measured how fast it acts, so treat these times as folk practice, not fact.
• How long to take it: Short use only. Old practice used it for a few days, while the heat or the loose stool lasted. Stop after three days if nothing has changed, and stop at once if you feel worse. Do not take it week after week; long use can dry you out and may make stools hard. Anyone who wants to use it for more than a few days should talk to a doctor or a licensed Korean medicine practitioner first.