Star Fruit

Star fruit, also known as carambola, is a small, waxy, golden-yellow tropical fruit distinguished by its five longitudinal ridges that produce star-shaped slices. Its flavor balances crisp sweetness with a refreshing tartness when fully ripe.

History & Origins

Star fruit is believed to have originated in the moist lowlands of Sri Lanka, the Moluccas, or southern India and has been cultivated across South and Southeast Asia for several centuries. It spread through tropical trade routes to the Caribbean and Latin America, was introduced to Florida in 1887, and is now grown commercially in Brazil, Malaysia, the Philippines, Taiwan, and the southern United States.

Nutrition Facts

Per 100 g, edible portion (estimated)

• 31 kcalCalories
• 1.0 gProtein
• 0.3 gFat
• 6.7 gCarbs
• 2.8 gFiber
• 3.9 gSugars
• 133 mgPotassium
• 34 mgVitamin C
• 3 mcgVitamin A

Culinary Uses

• Eaten raw as a fresh snack, sliced into its iconic star shape for fruit salads and garnishes
• Pressed into chilled juices, smoothies, and tropical cocktails
• Cooked into chutneys, pickles, and savory relishes in South and Southeast Asian cuisines
• Pickled or lightly salted as a crunchy condiment alongside rice and grilled seafood

Known Benefits

• High in vitamin C, supporting immune function and collagen synthesis
• Provides dietary fiber for digestive health
• Low in calories and rich in hydration due to high water content
• Contains antioxidants such as quercetin and gallic acid

Hidden Benefits

• Naturally contains oxalic acid that can chelate minerals, sometimes used in homemade rust and stain removers
• Provides small amounts of lutein and zeaxanthin that support retinal health
• Source of soluble fiber and polyphenols that may help moderate post-meal blood-sugar response
• The fruit's skin and ridges carry the highest concentration of carotenoids

Cautions & Considerations

• Contains caramboxin and high oxalic acid levels that are neurotoxic to individuals with chronic kidney disease
• May interact with prescription medications, particularly statins and blood pressure drugs
• Should be avoided by people with renal impairment, on dialysis, or with a history of kidney stones