Educational information, not medical advice — ask your doctor or midwife.
Sasam is the dried root of the ladybell plant, Adenophora triphylla. In Korean medicine it is a single drug, meaning it is one plant used on its own rather than a fixed mixture. It is best known as a remedy for a dry, tickly cough and a dry throat.
Korean practitioners class it as a "moistening" root. It is given to people whose cough is dry and unproductive, whose mouth and throat feel parched, or who are recovering from a long illness or fever that left them dry and tired.
The honest evidence picture: Sasam has a long and respected place in Korean herbal practice, but human trial evidence is very thin. Long traditional use tells you a plant has been used and tolerated for a long time. It is not the same thing as proof that it works, and that distinction applies to everything on this page.
Nobody has shown clearly how Sasam works in people. What follows is proposed, not proven.
In Korean and East Asian theory, Sasam is said to "moisten the lung" and "generate fluids" — traditional language for easing dryness in the airways and mouth. That is a description of how practitioners think, not a biological mechanism.
Laboratory work on Adenophora root extracts has reported mild anti-inflammatory (swelling-calming) and antioxidant (cell-protecting) activity, plus some loosening of mucus in animal tests. These are test-tube and animal findings. They do not tell you what a cup of Sasam tea does in a human body.
The most common form is dried sliced root, simmered in water to make a decoction (a strong tea made by boiling, not steeping). This is the traditional Korean preparation.
You may also find it as a powder, in capsules, or as a liquid extract. Some Korean products use it in honeyed syrups and lozenges aimed at dry throat.
It is also a food. Korean cooks use the fresh root as namul (a seasoned vegetable side dish) and pickle it as jangajji. Young shoots are eaten as a spring green.
One important label point: several different plants are sold under "sasam"-type names. Adenophora triphylla is not the same as Glehnia littoralis (haesasam, sold as "coastal sasam") or Codonopsis lanceolata (deodeok). Check the Latin name on the package.
Ladybell root has been used in Korea for centuries, both as a mountain vegetable and as a medicine for dry cough. It appears in the Korean herbal tradition as a cooling, moistening root for the lungs and throat.
Related Adenophora species are also used in Chinese materia medica under the name nan sha shen, and in Japanese Kampo practice. Species and naming differ between countries, so old texts do not always mean the same plant.
See a doctor if a cough lasts more than three weeks, or if it keeps coming back.
Get medical help the same day if you cough up blood, run a high fever, lose weight without trying, feel short of breath, or have chest pain.
Stop Sasam and seek urgent help if you get a rash, itching, swelling of the lips, tongue or throat, or any difficulty breathing after taking it.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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