Educational information, not medical advice — ask your doctor or midwife.
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Ushnan, also called Ghasul, is the ash of a salt-loving desert bush (Seidlitzia rosmarinus), known in English as saltwort or soapwort ash. It is a single drug in the Persian and Unani tradition, where it is used mainly on the outside of the body as a washing and cleansing agent for skin and scalp.
The ash is strongly alkaline (the opposite of acid, like washing soda). Mixed with water it foams and lifts grease, which is why it was used as soap long before bar soap was common. Traditional healers also applied it to itchy, scaly or greasy skin complaints.
Honest verdict on the evidence: Ushnan has a long and well-documented place in Persian and Unani practice, but we could not find published human trials testing it for any health condition. A long history of use tells you people valued something; it does not prove the thing works, and that distinction applies to everything on this page.
Ushnan works the way soap works, not the way a medicine works. Its alkaline salts break up oil and grease so dirt, scale and flakes rinse away from skin and hair.
Unani texts describe it as hot and dry in quality, and classify it as a jali (cleansing) and muhallil (dispersing) drug said to clear thick matter from the skin. That is a description in the language of traditional theory, not a tested mechanism.
Any benefit for greasy skin or flaky scalp is most likely simple degreasing. There is no good evidence that anything in the ash is absorbed to act inside the body, and no reason to expect it would help internal illness.
Ushnan is sold and used in a small number of simple forms.
Grey or off-white raw ash, sold loose by weight in traditional markets.
Sieved powder, sometimes blended with clay, chickpea flour or dried herbs for use as a body or scalp wash.
Hard cakes or lumps pressed from the ash, dissolved in water before use.
Traditional soaps in which the ash supplies the alkali, cooked with olive or other plant oil.
It is not a capsule, tea or tincture, and it should not be treated as one. Any product asking you to swallow raw Ushnan ash is asking you to swallow a caustic (burning) alkali.
Ushnan has been used across the deserts of Iran, Iraq, the Arabian Peninsula and Central Asia for well over a thousand years, both as household soap and as a medicinal wash. The Arabic name Ghasul simply means the washing thing.
Medieval Persian and Arabic writers on medicine list it among cleansing drugs for the skin, and the ash trade supplied soap and glass makers for centuries. It remains familiar in traditional markets today, mainly as a hair and body wash.
Some reactions to Ushnan (Ghasul) need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
See a doctor the same day if washing leaves you with a burn, blistering, raw weeping skin, or pain that does not settle after rinsing.
Get emergency help straight away if anyone swallows it, or if it gets into the eyes and pain, redness or blurred vision continue after rinsing. Take the packet or a photo of it with you.
Make a routine appointment if a rash, itch or flaking scalp lasts more than two weeks, spreads, or comes with fever, swelling or pus. A spreading itchy rash that other people in your home also have may be scabies, which needs prescription treatment.
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 Ushnan (Ghasul) 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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