Not many people know that star fruit is also a widely used medicinal herb in traditional medicine, with all its parts being therapeutic. Scientist and polyclinic physician Bui Dac Sang (Vietnam Academy of Science and Technology, Hanoi Oriental Medicine Association) shared that star fruit has a sour and astringent taste, and a neutral nature. It is effective in treating cough, phlegm, asthma, and diarrhea.

Star fruit is a popular snack among women, and it also helps treat some diseases. Photo illustration.
According to folk medicine, the most popular remedy is for cough treatment, using 10 green star fruits, 10 quats, and 10g of dried tangerine peel. Boil and drink this decoction once a day, divided into three doses. For those with bronchitis or asthma, the following recipe is recommended: 10 star fruits, 6g of Tỳ bà diệp, and 6g of cúc bách nhật. Boil these ingredients in 400ml of water, reducing it to about 200ml. Drink this decoction three times a day for 5-7 consecutive days.
Additionally, star fruit can be used to treat diarrhea and dysentery with the following recipes:
– Diarrhea treatment: Use 10 green star fruits, 40g of star fruit roots, 20g of hairy apricot roots… Boil and drink this decoction once a day, divided into three doses.
– Chronic dysentery treatment: Use 7 ripe star fruits, 10g of bitter herb leaves, and 25g of hairy apricot leaves. Boil and drink this decoction once a day, divided into three doses. It is recommended to drink this decoction continuously for one to two weeks.
Despite its health benefits and therapeutic properties, physician Bui Dac Sang particularly emphasizes the following considerations when consuming star fruit:
– Avoid excessive seasoning: When eating star fruit, avoid dipping it in sauces with a salty or spicy taste, as it may negatively affect your health. Excess salt intake can increase the risk of cardiovascular diseases and hypertension. While spicy sauces may neutralize the sourness of the fruit, they can also irritate the stomach.
– Rub and wash before eating: Whether ripe or unripe, star fruit should be rubbed to remove the waxy coating on its surface. Failing to do so may cause an itchy and sore throat, as the waxy substance can stick to the throat. Moreover, the wax is difficult to digest and may cause abdominal pain if consumed in large quantities.
Ripe star fruit should also be rubbed clean before eating to avoid potential health issues. Photo illustration.
– Avoid eating on an empty stomach or in large quantities: As mentioned, star fruit is sour and should only be consumed as a snack or in small amounts. It has low nutritional value, and its sourness can increase stomach acid, affecting the digestive system and even causing stomach irritation, ulcers, and inflammation. It is best to eat star fruit after a meal or 30 minutes before a meal to avoid stomach irritation. People with irritable bowel syndrome, alternating constipation and diarrhea, abdominal pain, bloating, and flatulence should also avoid star fruit.
For infants under one year old, whose digestive systems are still immature, the sourness of star fruit may be too strong. For older children, it is crucial to ensure they do not swallow the seeds, as they can be hazardous. Always rub off the waxy coating and powder before consumption to prevent throat irritation and coughing.