What is Nuo Dao Gen?

Nuo Dao Gen is the dried root of the sticky rice plant, Oryza glutinosa. The fine rootlets are used too. In Traditional Chinese Medicine (TCM) it is given for two main problems.

The first is sweating too much at night. The second is feeling feverish and dry after an illness.

It is a single herb, not a blend. Most often it is simmered into a tea, called a decoction. You can drink it on its own or add it to a larger formula.

It is seen as one of the gentlest herbs in Chinese medicine, close to a food.

Here is the honest evidence picture. The herb has a real place in one tradition. But there is almost no modern human research.

Long traditional use tells you that a substance has been taken, and tolerated, for a long time. It does not prove that the substance works. That applies to everything on this page.

How does Nuo Dao Gen work?

No one has shown how Nuo Dao Gen works in people. No one has shown that it does anything you can measure.

In TCM terms, it is said to 'nourish yin and stop sweating'. The idea is that it puts back fluid lost in night sweats. It is also said to settle the dry, low heat that TCM links to that pattern.

That is a description inside a traditional system. It is not an account of how the herb acts in the body.

In the lab, rice roots are found to hold starches, plant sugars and small amounts of plant acids. None of that has been tied to sweating, fever or recovery in a human trial.

What forms does Nuo Dao Gen come in?

Most often you will find it as loose dried rootlets, sold by weight. You simmer them in water.

Forms you may see: - Dried root and rootlets for a decoction (simmered tea) — the traditional and most common form - Fresh root, used in larger amounts, mainly in China - Granules or powdered extract, stirred into hot water - One ingredient inside a prescribed multi-herb formula

Western shops rarely sell it as a capsule or tincture.

Where it comes from:

Nuo Dao Gen turns up in later Chinese herb texts. It was a standard entry by the Qing dynasty. That is roughly the 17th to 19th centuries.

It sits in the group of herbs used for sweating that will not stop. It suited the night sweats and dry mouth that follow a long fever or a wasting illness.

It was valued for being cheap, mild and easy to get. Every rice-growing village had it.

It is still a minor but genuinely standard herb. It is more often a supporting part of a formula than the star of one.

What does Nuo Dao Gen help with?

• Night sweats (sweating heavily while asleep): This is the classic traditional use, and the best documented. TCM texts pair it with herbs like Fu Xiao Mai. That pairing is for sweating with a dry, hot, drained feeling. No human trials have tested it for night sweats. Its use here rests on tradition alone. Night sweats can also be a sign of infection, thyroid trouble or blood cancer. Get new or heavy night sweats checked before you treat them yourself.
• Sweating easily during the day without exercise: This is a second traditional use. Here it is usually a supporting herb, not the main one. No human studies exist. Do you sweat far more than the people around you? See a doctor. They can rule out thyroid problems, low blood sugar and side effects of your medicines.
• Dry mouth and thirst while you get over an illness: Tradition says it puts back lost fluid and eases dryness after a fever. That overlaps with simply drinking a warm, mild tea and taking in enough water. No trial has told the two apart. Dry mouth that lasts can come from medicines, diabetes or an autoimmune illness (where the body attacks itself). It is worth a medical opinion.
• A low feverish feeling after a long illness: It was used in tradition for the warm 'bone-steaming' feeling of recovery. There is no human evidence that it brings body heat down. A measured fever that does not settle needs a doctor, not a herb.
• Poor appetite while you recover from an illness: This is a minor traditional use. It rests on the herb's mild, slightly sweet, food-like nature. No clinical research backs it. Treat it as a gentle traditional tea. It is not a treatment for weight loss or appetite loss.

Which foods are rich in Nuo Dao Gen?

1. Glutinous (sticky) rice: the grain from the same plant, but a different part; eating it is not the same as taking the root

What are the side effects of Nuo Dao Gen?

• Bloating or a feeling of fullness
• Loose stools if you drink a lot of it
• Mild nausea in people with sensitive stomachs
• Allergic reaction in people allergic to rice: rash, itching, or swelling

Good to know:

Side effects appear to be uncommon and mild, and serious harm has not been reported. Read that carefully, though: it reflects a long history of casual use rather than any formal safety study. Stop taking it and get medical help straight away if you get a rash, swelling of the lips or tongue, or trouble breathing.

How much Nuo Dao Gen should you take?

• Recommended daily: No dose has been established by research, because the human studies that would set one have not been done. What follows is customary traditional practice, not a proven amount. Traditional Chinese Medicine sources typically use: - Dried root: 15 to 30 g per day, simmered in water - Fresh root: 30 to 60 g per day - Granule extract: follow the maker's label, which is usually far less by weight Simmer the dried root in about 500 ml of water for 20 to 30 minutes, strain, and drink over the day.
• Best time of day: For night sweats, the usual practice is to drink it in the late afternoon or early evening. Otherwise it is split into two servings, morning and evening.
• With or without food: Either. It is a mild, food-like tea. Taking it after food may suit you better if your stomach is easily upset.
• Time to effect: Traditional practice expects any change within a few days to two weeks. There is no trial data on how fast, or whether, it works.
• How long to take it: Traditional use is short and problem-focused: a week or two while the sweating settles. If nothing has changed after two weeks, stop and see a doctor rather than continuing or increasing the amount. Ongoing use beyond a month has not been studied and has no safety data behind it.