What is Deodeok (sasam)?

Deodeok is the thick white root of a climbing mountain plant from Korea. People eat it as food and use it as a mild home remedy for coughs and a dry throat. Its Latin name is Codonopsis lanceolata.

The root smells sweet and sharp. Cooks pound it flat, brush it with chilli paste, and grill it. It also goes into soups, salads, teas and honey drinks.

Solid human proof is missing. Almost all of the science is lab and animal work. Long use in Korean kitchens tells us the root is well liked and well tolerated as food, but it is not proof that it treats any illness.

The name sasam can be confusing. Some Korean texts use sasam for other roots, such as jandae. Check the Latin name on any product you buy.

How does Deodeok (sasam) work?

No one has shown how deodeok works in the human body. What follows is a best guess from lab work.

The root holds saponins. These are soap-like plant compounds that can loosen thick mucus (phlegm) in a test tube. That is the old reason it was given for wet coughs.

In mice and in cell dishes, some deodeok compounds calm swelling and slow fat build-up. Mice fed the root have also shown lower blood sugar and lower blood fats.

These results are early. Animal doses are often far higher than a bowl of food. They do not tell you what a meal or a cup of tea will do for you.

What forms does Deodeok (sasam) come in?

Most people meet deodeok as food, not as a pill.

Common forms:

Fresh root, peeled, pounded and grilled with chilli paste.

Fresh root shredded into a cold salad with vinegar.

Dried root slices, boiled to make a tea or soup stock.

Root steeped in honey or sugar to make a thick syrup for coughs.

Powder, capsules and alcohol tinctures sold as supplements.

Food forms have the longest track record. Strong extracts and capsules are newer and much less studied.

Where it comes from:

Deodeok has been dug from Korean mountains for hundreds of years. It was both a spring food and a home remedy.

Village cooks served it in early spring, when fresh greens were scarce. Folk healers gave the root, or a honey syrup made from it, for coughs, thick phlegm and a dry throat. It was also seen as a gentle tonic after illness.

Today it is farmed across Korea and sold fresh in markets. It sits firmly inside Korean food culture, which is why its traditional standing is strong even though its trial record is thin.

What does Deodeok (sasam) help with?

• Cough with thick phlegm (mucus): This is the classic Korean use. The root, or a honey syrup made from it, was given to help bring up thick phlegm. No human trial has tested deodeok for cough. Treat it as a warm, soothing food, not as a cough medicine.
• Dry or sore throat: Deodeok in honey is a common home drink for a scratchy throat. The honey and the warm liquid likely do much of the soothing. There is no trial showing the root itself helps.
• Recovery after a chest cold: Korean cooks serve deodeok soup to people who feel run down after illness. It is a light, easy food. Any benefit may simply come from eating well and resting. No study has tested this.
• Poor appetite and weak digestion: The root's slight bitterness was thought to wake up a dull appetite. Its inulin fibre feeds gut bugs. In some people that same fibre causes gas instead. No human trial supports this use.
• Tiredness and low stamina: Deodeok was used as a mild tonic food for people who felt weak. This is a traditional idea, not a tested one. If you are tired for weeks on end, see a doctor rather than treating it with food.
• High blood fats (animal data only): Mice fed deodeok extract had lower blood fats and gained less weight on a fatty diet. This has not been repeated in people. Do not use deodeok in place of cholesterol medicine.
• High blood sugar (animal data only): Some rodent studies show lower blood sugar after deodeok extract. Human results are unknown. If you take diabetes medicine, this matters mainly as a reason to watch your readings, not as a treatment.

Which foods are rich in Deodeok (sasam)?

1. Grilled deodeok with gochujang: the best known Korean dish
2. Deodeok namul: shredded root in a cold vinegar dressing
3. Deodeok soup or stock: made from dried slices
4. Deodeok honey syrup: a home drink for a dry throat
5. Deodeok tea: dried root boiled in water

Practical Tips:

Deodeok is a food first. Eating it in a meal is the form with the longest safety record.

What are the side effects of Deodeok (sasam)?

• Gas and bloating from the fibre
• Loose stools if you eat a lot at once
• Mild stomach ache
• Itchy mouth or throat right after eating
• Skin rash or itching from the fresh sap while peeling
• Allergic reaction in people sensitive to bellflower-family plants

Good to know:

Deodeok is eaten as a normal food in Korea and is well tolerated by most people. Gut upset is the usual complaint, and it passes.

True allergy is not common but does happen. Stop and get help if your lips or throat swell, or you get hives or trouble breathing.

Strong extracts and capsules have no long safety record. Side effects from them are less predictable than from food.

How much Deodeok (sasam) should you take?

• Recommended daily: There is no proven dose. Nothing has been tested well enough in people to set one. As food, a serving is about 30 to 60 g of fresh peeled root, one or two times a week. As a tea, Korean home practice uses roughly 6 to 12 g of dried root boiled in water for one day's drinking. For capsules, powders or tinctures, follow the label and do not go above it. These are much stronger than a meal and have no safety record to lean on.
• Best time of day: Any time of day. Many people drink the honey syrup or tea in the evening, when a cough feels worse. There is no evidence that timing changes anything.
• With or without food: Take it with or as food. The root is high in fibre, so a full stomach makes gas and bloating less likely. If a supplement upsets your stomach, take it with a meal.
• Time to effect: The warm, soothing feel of a tea or syrup is immediate and short-lived. For appetite or energy, no reliable timeline exists, because nothing has been measured in people.
• How long to take it: Food amounts can be eaten as often as you like any other root food. If you are taking a supplement for a cough or low energy, give it two to four weeks. Then stop and see if anything changed. See a doctor if a cough lasts more than three weeks, or if you feel worse at any point. Do not keep taking a supplement for months just because it is natural.