What is Yu Ye Tang?

Yu Ye Tang is a herb mix from Chinese medicine. The English name is Jade Fluid Decoction, which means a tea made by boiling herbs in water. It is handled as a single drug (TCM formula), not as seven loose herbs.

Also known as: Jade Fluid Decoction. It is used for a pattern the old texts call wasting and thirst. That means strong thirst, dry mouth, big hunger, and passing a lot of urine.

Today this picture is often linked with type 2 diabetes (high blood sugar). People also use the tea for dry mouth and tiredness after a long illness.

Here is the short verdict. We could not find clear human trials of this exact tea. Long use in one tradition is not proof that a remedy works, so read the rest with that in mind.

How does Yu Ye Tang work?

No one has shown how Yu Ye Tang works in the body. The old idea is that it feeds the body's fluids and lifts weak qi (life energy).

In that view, some herbs in the mix cool dryness. Others are said to hold fluid in so less is lost in urine. Ji Nei Jin is said to help the gut break food down.

Lab and animal work hints that astragalus and kudzu may nudge blood sugar down. That work was done in cells and in rodents, not in people.

So the honest answer is that the way it works is a theory, not a proven fact. If your blood sugar changes while you take it, the cause could just as easily be your diet, your weight, or your medicine.

What forms does Yu Ye Tang come in?

Most people take it as a fresh tea. A practitioner weighs out the raw herbs, and you boil them at home and drink the liquid.

It also comes as granules you stir into hot water, and as ready-made pills or capsules. Granules and pills are easier, but the herb amounts can differ a lot between brands.

Check that the label lists all seven herbs and the amount of each. Herbal products are not checked as closely as medicines, so buy from a seller who tests for heavy metals and added drugs.

Where it comes from:

The formula comes from China in the early 1900s. The doctor Zhang Xichun wrote it down in his book on joining Chinese and Western medicine.

He built it for wasting and thirst, the old Chinese name for a set of symptoms much like untreated diabetes. He wanted a mix that was moistening but did not weaken digestion.

It is now a standard teaching formula in Chinese medicine schools. That gives it firm standing in one tradition, but it is younger than many classical formulas.

What does Yu Ye Tang help with?

• Strong thirst and dry mouth linked with type 2 diabetes (high blood sugar): This is the main traditional use, and it is the reason the formula was written. We could not find good human trials of Yu Ye Tang itself for blood sugar. Treat it as a comfort measure only, and keep taking the medicine your doctor prescribed.
• Passing a lot of urine: Old texts say the formula helps the body hold onto fluid. There is no human trial that measured urine output on this tea. Frequent urination can signal diabetes, a bladder infection, or prostate trouble, so get it checked.
• Tiredness that comes with constant thirst: In Chinese medicine this pairing is read as weak qi (life energy) plus dryness, which is what the formula targets. No trial has tested it for tiredness. Tiredness with thirst is a common early sign of high blood sugar and deserves a blood test.
• Dry mouth after a fever or long illness: Practitioners sometimes use moistening formulas like this one while a person recovers. This use rests on tradition and clinical habit, not on published trials. Sips of water, and a check for drug side effects that dry the mouth, come first.

Which foods are rich in Yu Ye Tang?

1. Chinese yam (shan yao): eaten as a vegetable in soups and congee across East Asia
2. Kudzu root starch (kuzu): used to thicken sauces and puddings in Japanese and Chinese cooking
3. Schisandra berries: sold dried and brewed as a sour tea

Practical Tips:

Eating these foods is not the same as taking the formula; the cooked amounts are far smaller and the other herbs are missing.

What are the side effects of Yu Ye Tang?

• Loose stools or diarrhoea
• Bloating and wind
• Nausea
• Heartburn or a sour stomach
• Low blood sugar (shaking, sweating, confusion) if you also take diabetes medicine
• Skin rash or itching from an allergy to one of the herbs

Good to know:

Most people who take this tea for a short time report nothing worse than mild stomach upset. The serious risk is not the tea on its own. It is the risk of blood sugar dropping too low when the tea is added on top of diabetes drugs, and the risk of leaving high blood sugar untreated while you wait for a herb to work.

How much Yu Ye Tang should you take?

• Recommended daily: There is no dose that has been tested and agreed on for general use. Get an amount from a trained herbalist who knows your health history. The classic written recipe, for one day's tea, is roughly: Shan Yao 30 g, Zhi Mu 18 g, Huang Qi 15 g, Wu Wei Zi 9 g, Tian Hua Fen 9 g, Ji Nei Jin 6 g, and Ge Gen 4.5 g. The herbs are boiled and the liquid is split into two or three drinks across the day. For granules or pills, follow the label and do not double up. Never add this tea to a diabetes medicine without telling the doctor who prescribes it.
• Best time of day: Usually split into two or three drinks spread through the day, such as morning and late afternoon.
• With or without food: Often taken between meals, about an hour before or two hours after food. If it upsets your stomach, take it with a small meal.
• Time to effect: Not known from trials. Practitioners usually look for some change in thirst and dry mouth within one to two weeks.
• How long to take it: Short runs are the norm. Two to four weeks is a usual first course, then a review with your practitioner. Stop and rethink if nothing has changed after a month. Long unbroken use has not been studied for safety.