Swaeyang
Quick Facts
- What it is: Swaeyang is the dried stem of Cynomorium songaricum, a leafless desert plant used in Korean herbal medicine as a warming tonic.
- Main uses: Low sex drive in men, Weak, aching low back and knees, Tiredness with feeling cold, Dry, hard stools in older adults
- Best for: Traditional tonic use under a trained herbalist, Use inside a mixed formula rather than alone
- Active ingredients: Triterpenes such as ursolic acid, Flavonoids such as catechin and naringenin, Anthocyanins (red plant pigments), Tannins, Polysaccharides (plant sugars)
- Forms: Dried sliced stem for boiling, Powder, Capsules, Liquid extract made with alcohol, Stem steeped in rice wine
- Time to effect: Unknown; traditional use assumes slow change over two to four weeks.
- Side effects: Mostly mild gut upset and loose stools, but the true rate has never been counted.
Track this remedy in the app
Track Swaeyang with reminders and record whether it helped, in the app.
What is Swaeyang?
Swaeyang is a dried plant stem used in Korean herbal medicine. It is a single herb, not a mixture. Its Latin name is Cynomorium songaricum, and it is also sold as Cynomorium stem.
The plant has no leaves and no green colour. It grows on the roots of other desert plants and feeds off them. Healers dry the thick red-brown stem and boil it in water.
Old texts give it for a weak, sore low back and knees, for low sex drive, and for dry, hard stools in older adults. It is called a warming tonic for the "kidney" system. That old idea covers energy, sex drive and the lower back, not just the organ itself.
Here is the short verdict on the evidence. The traditional record is long and clear, but human testing is close to zero. Long use by healers is not proof that a remedy works, and that gap is the main thing to know before you buy it.
How does Swaeyang work?
No one has shown how Swaeyang works in the human body. What we have is lab work and animal work, and neither one proves an effect in people.
In rats, extracts of the stem have raised blood levels of male sex hormone in some studies. A few animal studies also report better sperm counts. These results are early, and they have not been repeated in humans.
Other lab work suggests the herb acts as an antioxidant. That means it can mop up free radicals, which are unstable particles that can damage cells. This happens in a test tube, which is a long way from a person.
The old use for hard stools is put down to a mild moistening effect on the bowel. No trial has measured this.
Treat every one of these ideas as a maybe, not a fact.
What forms does Swaeyang come in?
Sliced dried stem for boiling is the most common form. A herbalist may also put it into a mixed formula with other herbs.
You can also find it as a loose powder, in capsules, and as a liquid extract made with alcohol. Some Korean shops sell the stem soaked in rice wine as a tonic drink.
Quality swings a lot between sellers. Buy from a shop that names the plant on the label and says where it was grown.
Where it comes from:
Swaeyang has a long record across several Asian traditions. It appears in Chinese materia medica from about the 13th century and passed into Korean practice from there.
Mongolian and Central Asian healers used the same plant. In parts of Arabia the fresh stem was known as tarthuth and was eaten as desert food.
In Korean texts it sits beside other warming tonics and is often paired with them rather than used alone.
Who should avoid Swaeyang?
- Do not use if you are pregnant or trying to become pregnant; its safety in pregnancy has never been studied.
- Do not use if you are breastfeeding.
- Do not give it to children.
- Do not use if you have a hormone-sensitive cancer (a cancer such as prostate or breast cancer that can grow faster when sex hormones are higher).
- Do not use if you take hormone-blocking drugs for prostate or breast cancer, because the herb may work against them.
- Do not use if you take testosterone or any other hormone treatment, unless your doctor agrees.
- Avoid it if you take a blood thinner such as warfarin, apixaban or clopidogrel, unless your doctor agrees.
- Avoid it if you take medicine for diabetes, unless your doctor agrees and you check your blood sugar more often.
- Do not use if you have diarrhoea or loose stools now, because it can make them worse.
- Do not use if you have a fever or an active infection; traditional practice holds back warming tonics at these times.
- Do not use if you have had an allergic reaction to it before.
When should you see a doctor?
See a doctor instead of treating yourself if your low back or knee pain lasts more than a few weeks, keeps you awake, or comes with numbness or weakness in a leg.
Book an appointment if your erections have changed recently, if you are trying for a baby without success, or if you feel tired for more than a few weeks. These can be signs of heart trouble, diabetes or a thyroid problem.
Also see a doctor if your bowel habit changes and stays changed, or if you see blood in your stool.
Stop the herb and get medical help the same day if you get a rash, swelling of the lips or face, trouble breathing, yellow skin or eyes, or unusual bruising or bleeding.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
4.8
