Star Fruit

Star Fruit: Nutrition Facts and Health Benefits

Star fruit (Averrhoa carambola), also known as carambola, is a tropical fruit named for the five-pointed star shape it makes when sliced crosswise. Native to Southeast Asia and the Indian subcontinent, it is widely grown across tropical and subtropical regions including Southeast Asia, South America, the Caribbean, Hawaii, Florida, and parts of Africa. The fruit ranges from tart to mildly sweet depending on variety and ripeness, with a crisp, juicy texture and a thin, entirely edible skin. Its distinctive appearance makes it popular as a garnish and decorative element in food presentation.

Nutritional Value of Star Fruit

Star fruit is a low-calorie fruit, providing around 31 kcal per 100 g. It is a good source of vitamin C, with a 100 g serving providing a meaningful contribution toward the daily recommended intake. Star fruit also contains dietary fibre, potassium, vitamin B5 (pantothenic acid), folate, and small amounts of other B vitamins and minerals. It contains antioxidant polyphenols including quercetin, gallic acid, and epicatechins. The tart flavour of less ripe star fruit comes from oxalic acid, which is also found in spinach and rhubarb.

Health Benefits of Star Fruit

Star fruit's vitamin C content supports immune function and antioxidant defence. Its low calorie and carbohydrate content makes it a useful fruit for those managing caloric or carbohydrate intake. The polyphenols in star fruit have been studied in preclinical research for antioxidant and anti-inflammatory effects. An important health note: star fruit contains caramboxin, a neurotoxin that healthy kidneys filter out without issue, but which can accumulate dangerously in people with kidney disease or undergoing dialysis. Individuals with chronic kidney disease should avoid star fruit entirely and consult their doctor.

How to Select and Store Star Fruit

A ripe star fruit should be mostly yellow with slightly brown edges on the ridges of the star. Greenish star fruit is unripe and more tart. Choose fruits with firm flesh without extensive bruising. Star fruit keeps at room temperature for a few days and can be refrigerated for up to a week. It is best consumed fresh, as it does not freeze particularly well due to its high water content.

How to Use Star Fruit

Star fruit can be eaten fresh without peeling. Remove the thin fibrous edges of the ridges before slicing if desired. It is used in fruit salads, as a garnish for drinks and desserts, in salsas, chutneys, and stir-fries. Star fruit juice is popular in Southeast Asia. The tarter varieties work well in pickles and preserves.