What is Fo Shou?

Fo Shou is the dried fruit of Buddha's hand, a citrus that grows in long yellow fingers. Chinese medicine uses it on its own to ease a tight chest, a full stomach and poor appetite. It is also used for a cough that brings up phlegm (thick mucus).

The proof is thin. We found no human trials that test Fo Shou by itself for any health problem. Long use in a tradition is not the same as proof that it works, so treat the claims below as unproven.

The fruit is sour and bitter and smells strongly of flowers. Cooks use the peel in tea, candy and jam. Many homes in China keep one just for the smell.

In the clinic it is given as a mild herb for the stomach and chest. It is usually one part of a larger formula rather than a stand-alone cure. Doctors in China often pair it with other herbs for bloating, burping and stress-linked stomach pain.

Because it is a citrus peel, it carries the same drug-interaction question that grapefruit does. That matters more than any side effect of the herb itself, so read the drug list further down before you start.

How does Fo Shou work?

Nobody has shown how Fo Shou works in people. What follows is theory and lab work.

In Chinese medicine, Fo Shou is said to move stuck qi (the body's vital energy). Old texts say it calms the liver, settles the stomach and breaks up phlegm. That is a way of sorting symptoms, not a test of body chemistry.

Lab work points to the peel's oil and its flavonoids (plant colour compounds). In test dishes and in animals, these can relax gut muscle and calm swelling. No one has shown that this happens in your gut after a cup of the tea.

What forms does Fo Shou come in?

Fo Shou is sold most often as dried slices of the whole fruit. You simmer these in water to make a decoction (a strong herbal tea).

Other forms include tea bags, powder, candied peel and liquid extracts. Herb shops also sell it inside mixed Chinese formulas.

The essential oil is made for scent only. Do not swallow it.

Where it comes from:

Buddha's hand has been grown in China for well over a thousand years. Li Shizhen listed it in his great herbal book of 1596.

It became a staple stomach and chest herb in Chinese medicine and is still used that way. It is also a New Year gift fruit, kept in the house for luck and for its scent.

What does Fo Shou help with?

• Bloating and fullness after meals: This is the main traditional use. Chinese texts have used Fo Shou for a full, stuffed feeling in the upper belly for centuries. No human trial has tested it for bloating, so we cannot say how well it works or whether it beats a plain warm drink.
• Poor appetite: Bitter, aromatic peels have long been used to wake up appetite. Fo Shou is given this way in China, often with other herbs. The evidence here is tradition and clinical habit only, not trials.
• Nausea and burping: Old texts describe it as settling a stomach that pushes upward, which covers burping, hiccups and mild nausea. Related citrus peels have some lab support for calming gut muscle. There are no human trials of Fo Shou for nausea.
• Tight or sore feeling under the ribs: In Chinese medicine this points to stuck liver qi, and Fo Shou is a standard choice for it. This is a traditional pattern, not a tested diagnosis. New or ongoing rib or chest pain needs a doctor, not a herb.
• Cough with phlegm: Fo Shou is used as a mild helper herb for a wet cough, not as the main treatment. Support comes from tradition and from lab work on the oil. No trial has tested it in people with a cough.
• Stress-linked stomach discomfort: The scent is used to lift mood and loosen a tight chest. Some lab and animal work on citrus oils suggests a calming effect. That work does not show the same thing happens in people drinking the tea.

Which foods are rich in Fo Shou?

1. Candied Buddha's hand peel: a common Chinese sweet made from the whole fruit
2. Buddha's hand tea: dried slices steeped in hot water
3. Marmalade and jam: the fruit has almost no flesh or juice, so only the peel is used
4. Infused rice wine or spirits: a home preparation in parts of China
5. Zest in cooking: grated over fish, salads and baked goods for scent

Practical Tips:

Food amounts of the peel are widely eaten and considered safe for most people.

What are the side effects of Fo Shou?

• Mild stomach upset or loose stools
• Dry mouth or a dry throat
• Heartburn from the sour taste
• Allergic rash or itching in people sensitive to citrus
• Skin that burns faster in sunlight after handling the fresh peel or oil

Good to know:

Fo Shou is well tolerated at food and tea amounts, and serious harm has not been reported. Most complaints are mild stomach upset that stops when you stop the herb. The bigger concern is not the herb alone but how citrus compounds may change the level of some prescription drugs in your blood.

How much Fo Shou should you take?

• Recommended daily: No dose has been set by research, because the human trials do not exist. In Chinese practice, the usual amount is 3 to 9 grams of the dried fruit a day, simmered in water. Tea bags and extracts follow the label, and packet strengths vary a lot.
• Best time of day: Most people drink it after meals, when bloating and fullness are worst. Spread the amount over two or three cups across the day.
• With or without food: Take it with or just after food. Bitter herbs on an empty stomach can make some people feel queasy.
• Time to effect: Any easing of bloating or burping is usually felt within an hour or two, if it comes at all. There is no trial evidence to back that timing.
• How long to take it: It is normally used in short runs of one to three weeks. If your symptoms have not eased after two weeks, stop and see a doctor. Do not use it for months on end without medical advice.