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Caltrop fruit, also known as water caltrop or Trapa natans, is a type of aquatic plant that produces a spiny fruit that resembles a small water chestnut. In traditional medicine, the fruit and other parts of the plant have been used for various purposes, including as a diuretic, expectorant, and digestive aid.

Caltrop fruit is believed to contain a variety of active compounds, including saponins, flavonoids, and tannins, that may contribute to its medicinal properties. However, there is limited scientific research on the effectiveness of caltrop fruit for medical purposes.



  • Diuretic effects: Caltrop fruit is believed to have diuretic properties, which means that it can help increase urine production and eliminate excess fluid from the body. This may be useful for treating conditions such as edema and high blood pressure.

  • Digestive health: Caltrop fruit is also used in traditional medicine to promote digestive health. It is believed to help regulate digestive function and alleviate symptoms of diarrhea and other digestive disorders.

  • Respiratory health: Caltrop fruit is believed to have expectorant properties, which means that it can help break up mucus and phlegm in the respiratory system. This may be useful for alleviating symptoms of coughs, bronchitis, and other respiratory conditions.



  • Caltrop fruit can interact with certain medications, including blood thinners and medications for high blood pressure, and should not be used by people taking these medications without first consulting a healthcare provider.

  • Caltrop fruit can cause gastrointestinal symptoms, such as nausea, vomiting, or diarrhea, in some people.

  • The safety of using caltrop fruit during pregnancy and breastfeeding has not been fully studied, and it is best to consult with a healthcare provider before using it during these times.

  • Caltrop fruit may increase testosterone levels, which can be harmful for people with certain medical conditions, such as prostate cancer or breast cancer.

  • Some people may be allergic to caltrop fruit and should avoid using it if they experience any allergic reactions.


Tastes LIke:

Tt does not have a distinct taste or flavor. In some cases, caltrop fruit may be included as a component of a larger herbal tea or formula, which can have a range of flavors depending on the other herbs included in the mixture. In these cases, caltrop fruit is believed to have a slightly sweet and nutty flavor.



  • Decoction: A decoction is a strong tea made by boiling herbs in water. To prepare a decoction that includes caltrop fruit, place the prescribed amount of the fruit and other ingredients in a pot with water, bring to a boil, and simmer for 20-30 minutes. The mixture is then strained and consumed as directed.

  • Powder: Caltrop fruit may also be ground into a powder and added to other powdered herbs to create a customized formula. The powdered herbs can be mixed with water to create a tea or taken directly in capsules or pills.

Caltrop Fruit (Ba Ji Li)

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