What is Gan Song?

Gan Song is the dried root of a small mountain plant, Nardostachys jatamansi. In Chinese medicine it is used for a bloated, aching belly and poor appetite. It is also used to help settle a restless mind.

The root has a strong, sweet, musky smell. Healers most often add a small amount to a mixed formula with other herbs. It is rarely taken on its own.

Here is the plain verdict. Gan Song has a long record of traditional use, but almost no human trials. Traditional use tells you what people have done for a long time; it is not proof that the herb works.

How does Gan Song work?

No one has shown how Gan Song works in the human body. What follows is the traditional idea plus some early lab work.

In Chinese medicine, Gan Song is said to move stuck qi (the body's flow of energy) in the middle of the body. That is the old way of describing a tight, bloated, sore belly that eases once things start moving again.

In the lab, the root contains oils that can calm nerve cells in animals. That fits its use for restlessness and poor sleep. But animal and test-tube results often do not carry over to people, so treat this as a hint, not an answer.

What forms does Gan Song come in?

Gan Song is sold in a few simple forms:

Dried root pieces, boiled in water to make a tea (a decoction). This is the most common way it is used.

Powder, sometimes pressed into pills or capsules.

Granules, which are dried herb tea you stir into hot water.

A strong wash or rinse for the skin or mouth, used on the outside of the body only.

Most of these come as part of a mixed formula. Single-herb products are less common. Note that the wild plant is now rare and protected in parts of Asia, so check that your source is legal and farmed.

Where it comes from:

Gan Song appears in Chinese herbal texts from about the 8th century, in the Tang dynasty. It was traded down from the high Himalayas of Nepal, Tibet and northern India.

The same root is called jatamansi in Ayurveda, the traditional medicine of India, where it is used for sleep and worry. The Greeks and Romans knew the plant as spikenard and prized its scent.

In Chinese practice it sits in the group of herbs said to move qi and ease pain in the belly.

What does Gan Song help with?

• Bloating and belly pain: This is the main traditional use, and it is a strong one within Chinese medicine. Practitioners add Gan Song to formulas for a tight, full, sore belly that comes and goes with stress. Human trial evidence for this use is missing. No good study has tested Gan Song alone against a dummy pill for belly pain.
• Poor appetite: Gan Song is described in old texts as a herb that 'opens the stomach', meaning it helps you want to eat again. It is paired with herbs like sha ren or mu xiang for this. There are no human trials. If your appetite has dropped for more than a few weeks, that needs a doctor, not a herb.
• Restlessness and trouble sleeping: Both Chinese and Indian traditions use this root to calm a busy mind. Animal studies show the oils can have a calming effect. Human studies are very few and small, and most tested the Ayurvedic form, jatamansi, not Chinese formulas. Nothing here is strong enough to call it a sleep aid.
• Toothache (used as a mouth rinse): Traditional texts list a strong Gan Song tea, held in the mouth and spat out, for sore gums and toothache. It is not swallowed for this use. There is no trial evidence. Tooth pain usually means decay or infection, which needs a dentist.
• Itchy or sore skin (used as a wash): A cooled tea is used as an outside wash for itchy or sore skin in some folk practice. This use is minor and local. No human trials support it. Stop at once if the skin gets redder or stings.

Which foods are rich in Gan Song?

You cannot get Gan Song from your diet; it is used only as a prepared herb.

What are the side effects of Gan Song?

• Feeling sleepy or slow
• Upset stomach or loose stools
• Mild headache
• Dry mouth
• Skin rash or itch from the outside wash
• Allergic reaction (rare): rash, swelling, or trouble breathing

Good to know:

Most people who take Gan Song in a formula report no trouble. Bad effects are rare in the records we have.

But those records are weak. No one has run a safety trial on this herb in people. Mild effects may simply have gone unnoticed.

The most likely effect is feeling sleepy. Take care with driving until you know how it hits you.

How much Gan Song should you take?

• Recommended daily: There is no dose proven by research. The numbers below come from standard Chinese herbal practice. Dried root boiled as a tea: about 3 to 6 grams a day, split over the day. Powder: about 0.5 to 1 gram a day, which is much less, because powder is stronger by weight. As a wash or mouth rinse: a stronger tea, used on the outside only, never swallowed. Start at the low end. A trained herbalist will set the amount to fit you and the other herbs in your formula.
• Best time of day: For belly bloating, take it with or just after meals. For restlessness at night, take the evening dose about an hour before bed.
• With or without food: Take it with food or straight after a meal. This is gentler on the stomach. The wash and mouth rinse are not swallowed at all.
• Time to effect: If it helps your belly at all, people usually notice within a few days to two weeks. Any calming effect, if real, would show up in the first week. If two weeks bring no change, it is not working for you.
• How long to take it: Short courses are the norm. Most practitioners use Gan Song for two to four weeks for a belly problem. Check in with yourself at two weeks. If nothing has changed, stop and see a doctor instead of raising the dose. There is no safety data for long-term daily use. Do not stay on it for months without a trained person watching you.