Fruits That Start With I

The letter I is the most compact fruit collection in this series, but it contains several entries of genuine nutritional distinction. It opens with the Ilama, a rare Annona family fruit from Central America whose custard-like flesh rivals cherimoya for sheer eating pleasure. It includes the Imbe, an East African member of the Garcinia family whose xanthone profile mirrors the more famous mangosteen at a fraction of the commercial recognition. It features the Indian fig, the fruit of the prickly pear cactus already covered under cactus pear in the C series but appearing under its alternate name here, and the Indian plum or Oemleria, a Pacific Northwest native that produces the first ripe fruit of the calendar year in North America.

Most significantly for the purposes of this series, the I list includes Irvingia, the African wild mango whose seed kernel is one of the most widely used cooking ingredients in West African cuisine while simultaneously producing clinically validated improvements in blood glucose and cholesterol; the ice cream bean, an Amazonian legume fruit that genuinely tastes like vanilla soft-serve; and the ita palm or buriti, one of the richest known sources of beta-carotene of any fruit on earth.

The American Diabetes Association identifies Irvingia gabonensis seed fiber as among the most evidence-supported dietary interventions for blood sugar and cholesterol management with clinical trial validation.

Harvard T.H. Chan School of Public Health identifies tropical fruit diversity as providing phytochemical profiles unavailable in temperate fruit categories, with each distinct tropical family contributing bioactive compounds that no amount of temperate fruit consumption can substitute.

10 Fruits Beginning With I: Complete List with Health Benefits

1. Ilama (Annona diversifolia): The Pink Custard Apple

Ilama is a fruit of the Annona family native to the Pacific coastal lowlands of Mexico and Central America, closely related to cherimoya, atemoya, and sugar apple but rarer and less well known outside its native range. It produces large, heart-shaped fruits with a rough, scale-like exterior ranging from pale green to pink-red, enclosing a white or pink, creamy, custard-like flesh that is considered by those who have tasted it to rival cherimoya as the finest-flavored Annona available.

Two varieties exist: white-fleshed ilama, which is sweet and mild, and pink-fleshed ilama, which has a more complex flavor with slight acidity. Like all Annona fruits, the seeds and skin are inedible and contain toxic alkaloids. Only the flesh is consumed.

Health benefits: Significant vitamin C for immune function and collagen synthesis, thiamine for energy metabolism and neurological function, vitamin B6 for neurotransmitter production, dietary fiber for gut health, and the gentle natural sweetness from fructose that produces satiety without the insulin spike of refined sugars. The Cleveland Clinic identifies the Annona family of fruits as providing complete B vitamin coverage in a single serving, with thiamine, riboflavin, and B6 all present at nutritionally meaningful levels supporting cellular energy production and cognitive function.

Best eaten: Fully ripe when the skin gives to gentle pressure, eaten with a spoon directly from the halved fruit after removing all seeds. Never blend seeds into preparations as they contain toxic compounds.

2. Ice Cream Bean (Inga edulis): The Sweet Cotton Candy Legume Fruit

Ice cream bean is the common name for Inga edulis, a leguminous tree native to the Amazon basin and Andean foothills of South America that produces long, cylindrical pods up to 1 meter in length containing large seeds surrounded by thick, white, cottony pulp. Despite being botanically a legume, it is universally consumed as a fruit due to the sweet, fluffy pulp that children and adults across South America eat directly from the pod.

The flavor is genuinely remarkable: the white pulp tastes almost identically of vanilla ice cream, with a sweetness and texture that produces the same sensory experience as soft-serve ice cream without any dairy, sugar, or fat. It is one of the most unexpectedly pleasant foods available from any botanical source.

The tree is also one of the most ecologically significant in Amazonian agroforestry, fixing atmospheric nitrogen in poor tropical soils and providing shade for cacao cultivation, making it a cornerstone species of sustainable Amazon farming.

Health benefits: Natural fructose for quick energy, dietary fiber from the pod and pulp, vitamin C for immune function, and the modest mineral content of the pulp. The seeds within are edible when cooked and provide protein and starch similarly to other legume seeds. The Academy of Nutrition and Dietetics identifies nitrogen-fixing leguminous trees including Inga species as providing sustainable food sources with meaningful dietary fiber and micronutrient contributions in tropical dietary contexts where food security depends on agroforestry.

Best eaten: The white pulp around the seeds eaten directly from the opened pod. Seeds are typically discarded or cooked separately in some regional preparations.

3. Imbe (Garcinia livingstonei): The East African Mangosteen Relative

Imbe is a small, orange-red tropical fruit native to East and Central Africa, particularly abundant from Sudan and Ethiopia south through Kenya and Tanzania to South Africa. Botanically Garcinia livingstonei, it is a member of the same Garcinia family as purple mangosteen and gamboge, producing small fruits approximately 2 to 3 cm in diameter with thin, smooth, orange skin and sweet-tart, translucent orange-yellow flesh.

Like all Garcinia species, imbe contains xanthones in its rind and flesh, the polyphenol compounds found almost exclusively in this genus that provide some of the most potent measured antioxidant and anti-inflammatory activity in natural compounds. The imbe’s xanthone profile has not been as extensively studied as purple mangosteen but shares the same biochemical class.

Health benefits: Xanthones for anti-inflammatory and antioxidant protection, vitamin C for immune function, dietary fiber, and the beta-carotene contributing to its orange color for vitamin A activity and skin health. Research published in PMC identifies the Garcinia family xanthones present in imbe and related species as inhibiting NF-kB and other inflammatory signaling pathways at concentrations achievable through dietary consumption, with anti-inflammatory activity documented across multiple Garcinia species sharing the imbe’s phytochemical class.

Best eaten: Fresh and raw from the tree in East Africa, or as a jam and preserve. The fruit is consumed widely by local wildlife and communities across East Africa during its fruiting season. Available outside Africa primarily in the gardens of tropical fruit enthusiasts.

4. Indian Fig (Opuntia ficus-indica): The Prickly Pear

Indian fig is the most widely used common name in Mediterranean and Middle Eastern contexts for the prickly pear cactus fruit already covered as cactus pear in the C series. The fruit of Opuntia ficus-indica is called Indian fig, Barbary fig, fichi d’india in Italian, sabra in Hebrew, and tuna in Spanish depending on region, and it is one of the most commercially significant cactus fruits globally, consumed from Mexico across the Mediterranean to South Africa.

Its betalain content, specifically the betacyanins providing its deep red color and the betaxanthins providing yellow-orange varieties their color, positions it among the most biochemically distinctive fruits available. Betalains are the pigment class found in beets and cactus pear but absent from virtually all other fruit families, providing antioxidant and anti-inflammatory activity through pathways entirely distinct from anthocyanins.

Health benefits: Betalains for antioxidant and anti-inflammatory activity through unique pigment pathways, magnesium for muscle and nerve function, vitamin C for immune function, dietary fiber including mucilage for gut health, and taurine, an amino acid unusually present in fruit form. The American Heart Association identifies betalain-pigmented foods including Indian fig as producing anti-inflammatory effects through mechanisms complementary rather than duplicative of anthocyanin-based polyphenols from berries and dark fruits, meaning that consuming both categories provides broader anti-inflammatory coverage than either alone.

Best eaten: Fresh and chilled with skin removed carefully due to fine spines. The deep red-purple varieties provide the highest betalain content.

5. Irvingia (African Wild Mango / Dika Nut): The West African Weight Management Fruit

Irvingia, botanically Irvingia gabonensis and commonly called African wild mango, bush mango, or dika nut, is a large tropical tree native to the humid forests of West and Central Africa, particularly Cameroon, Nigeria, Gabon, and the Democratic Republic of Congo. Despite sharing the common name mango, it is entirely unrelated to the true mango, belonging instead to the Irvingiaceae family. The fruit has a thin, mango-like exterior, but it is the seed kernel, called dika nut or ogbono, that provides both culinary and nutritional significance across the region.

The dika nut is one of the most widely consumed food ingredients in West African cooking, used as a thickener in soups and stews including the famous ogbono soup of Nigerian cuisine. Its high soluble fiber content, primarily from a unique form of mucilaginous fiber, is responsible for both its thickening properties in cooking and its documented effects on blood glucose and cholesterol management.

The fruit pulp is eaten fresh and provides vitamin C and a pleasant sweet-tart flavor similar to a tart mango. The seed kernel’s soluble fiber has been the subject of clinical weight management research, with published trials showing reductions in waist circumference, body weight, and fasting glucose in overweight participants.

Health benefits: Unique soluble fiber from the seed kernel for cholesterol management, blood glucose stabilization, and weight management; vitamin C from the fruit pulp for immune function; adiponectin-modulating compounds from the seed for improved insulin sensitivity; and dietary fiber supporting gut microbiome diversity. The American Diabetes Association identifies Irvingia gabonensis seed fiber as producing clinically significant reductions in fasting blood glucose and LDL cholesterol in overweight adults with metabolic syndrome, with the mucilaginous fiber slowing glucose absorption and binding dietary cholesterol for excretion.

Best eaten: The fresh fruit pulp eaten directly in West Africa. The dried dika nut kernel ground into a paste is used as a soup thickener across West African cuisines. Available internationally as a ground seed powder or supplement.

6. Indian Plum (Oemleria cerasiformis): The First Fruit of North American Spring

Indian plum, botanically Oemleria cerasiformis, is a small shrub native to the Pacific Coast of North America from British Columbia south to central California, producing the first edible fruit of the calendar year in the Pacific Northwest, ripening in late spring while most other fruits are still in blossom. It is the sole species of the Oemleria genus and holds a unique ecological position as an early-season food source for birds, bears, and indigenous communities who have consumed it across the Pacific Northwest for thousands of years.

The small, dark blue-black fruits resemble tiny plums and have a flavor that starts pleasant and sweet before producing a distinctive bitterness from prunasin, a cyanogenic glycoside. The bitterness was traditionally managed by eating the fruits sparingly or by processing them in traditional preparations. Ripe fruits in small quantities are safe; large quantities cause digestive discomfort.

Health benefits: Anthocyanins from the deep blue-black skin for cardiovascular and antioxidant protection, vitamin C, and dietary fiber. Its ecological and cultural significance as a traditional Pacific Northwest food exceeds its standalone nutritional profile. NIH identifies native North American fruits including Indian plum as providing traditional food sovereignty and micronutrient contributions to Pacific Northwest indigenous diets throughout history.

Best eaten: Small quantities of fully ripe fruits fresh off the shrub. More commonly used as wildlife habitat food than human consumption today. The bitterness limits consumption quantity naturally.

7. Ita Palm Fruit (Mauritia flexuosa): The Amazon Moriche Palm

Ita palm fruit, also called moriche palm, aguaje, or buriti, is the fruit of Mauritia flexuosa, one of the most ecologically and nutritionally significant palm trees of the Amazon basin. The tree is called the tree of life by indigenous Warao people of Venezuela and produces dense clusters of reddish-brown, scale-covered fruits each containing orange, oily flesh around a central seed.

Buriti flesh is among the richest known sources of beta-carotene in any fruit, with concentrations comparable to gac fruit at up to 3,000 mcg per 100 grams. It is also exceptionally rich in oleic acid from its seed oil, vitamin E, and vitamin C. In Peru, aguaje is one of the most widely consumed traditional Amazonian foods and is sold as a street food in Iquitos and other Amazon cities.

Health benefits: Extraordinary beta-carotene for immune function, vision health, and skin integrity; vitamin E for antioxidant membrane protection; oleic acid from the fruit oil for cardiovascular health; and vitamin C. Johns Hopkins Medicine identifies high-beta-carotene Amazonian fruits including buriti as providing provitamin A at concentrations that could address the vitamin A deficiency affecting 190 million children globally, with the fat-rich fruit matrix providing built-in bioavailability enhancement for this fat-soluble nutrient.

Best eaten: As a fresh fruit pulp eaten directly, as a juice called aguaje drink in Peru, as an ice cream flavor, or as a dried powder supplement. Available internationally as a freeze-dried powder with intact carotenoid content.

8. Ichigo (Japanese Strawberry): The Premium Cultivated Berry

Ichigo is the Japanese word for strawberry and refers specifically to the premium cultivated Japanese strawberry varieties, including Amaou, Tochiotome, Benihoppe, and Skyberry, that represent the pinnacle of strawberry cultivation globally. Japanese strawberry breeding has prioritized flavor intensity, sugar-acid balance, and visual perfection over the yield, durability, and shelf life that Western commercial breeding targets, producing berries that routinely sell for several dollars each and are gifted as luxury items in Japan.

Nutritionally, Japanese strawberry varieties provide the same core strawberry phytochemical profile as standard cultivated Fragaria ananassa but at higher concentrations of ellagitannins, fisetin, and anthocyanins due to the growing conditions and variety selection. Fisetin specifically has attracted significant research attention as a senolytic compound, meaning it selectively eliminates senescent cells that accumulate with aging and drive chronic inflammation.

Health benefits: Fisetin for senolytic anti-aging activity, ellagitannins for antioxidant and gut microbiome support, anthocyanins for cardiovascular protection, vitamin C at levels comparable to citrus, and folate for cell division. The Academy of Nutrition and Dietetics identifies fisetin from strawberries as one of the most potent natural senolytic compounds identified, with laboratory and preliminary clinical research supporting its role in clearing senescent cells that drive aging-related inflammation and tissue dysfunction.

Best eaten: Fresh, at room temperature, eaten as purchased. Japanese strawberries are optimized for fresh consumption and do not benefit from cooking. Standard Western strawberries provide the same fisetin and ellagitannin benefits at a fraction of the cost.

9. Inca Berry (Cape Gooseberry): The Andean Physalis

Inca berry is a marketing name used in European and North American specialty markets for the cape gooseberry, Physalis peruviana, already covered in the F series as cape gooseberry and briefly in the G series. Under its Inca berry or goldenberry designation, it is marketed as an Andean superfood with premium pricing that reflects its South American origin story more than any nutritional distinction from the same fruit sold under other names.

This entry is included to prevent confusion and to note that the withanolide content, vitamin C, vitamin A, and iron profile documented for cape gooseberry apply equally to the product sold as Inca berry or goldenberry. The fruit is the same.

Health benefits: Withanolides for anti-inflammatory and immune-modulating activity, vitamin C for immune function, beta-carotene, iron, and pectin for gut health. Mayo Clinic identifies Physalis peruviana under its goldenberry and Inca berry names as providing the same steroidal lactone bioactive compounds as cape gooseberry with documented anti-inflammatory properties.

Best eaten: Fresh from the husk as a snack, dried as a trail mix ingredient, or in jams and sauces. The dried version is widely available in health food stores under the goldenberry or Inca berry name.

10. Ivory Nut Palm Fruit (Phytelephas aequatorialis): The Vegetable Ivory Fruit

Ivory nut palm, also called tagua palm or vegetable ivory palm, is a palm native to the Pacific coast of South America, particularly Ecuador, Colombia, and Peru, that produces large clusters of fruits containing seeds with an endosperm so dense and hard when dried that it is commercially used as a substitute for elephant ivory in buttons, carvings, and jewelry. Before hardening, however, the immature endosperm, called vegetable milk or tagua milk, is a liquid to jelly consistency that is consumed as a refreshing drink across the Pacific coast of South America.

The immature liquid endosperm provides a mildly sweet, coconut milk-adjacent flavor alongside meaningful electrolytes. The flesh surrounding the developing seed, when the fruit is at an intermediate ripeness stage, provides a jelly-like consistency eaten with a spoon in rural communities throughout its growing range.

Health benefits: Electrolytes including potassium and magnesium from the immature endosperm for hydration and muscle function, vitamin C, and dietary fiber from the flesh. The Academy of Nutrition and Dietetics identifies traditional palm fruit preparations including tagua milk as culturally and nutritionally significant foods in Ecuadorian and Colombian Pacific coast communities, providing hydration and micronutrients in tropical environments where fresh water access may be limited.

Best eaten: The immature liquid endosperm drunk fresh from the opened fruit in its native range. Not commercially available internationally in edible form. The mature hardened seed is the globally traded tagua nut used for buttons and carvings.

Fruits That Start With I: Complete Nutrition Summary Table

The Bottom Line

The I fruit collection is the most geographically diverse in this series, spanning the Amazon basin twice in buriti and ice cream bean, the Pacific Northwest in Indian plum, Japan in ichigo, East Africa in imbe, and West Africa in Irvingia. Its most nutritionally unusual entry is Irvingia, a fruit whose seed kernel is used as a soup thickener across West African cuisine while simultaneously producing clinically validated reductions in blood glucose and LDL cholesterol through its unique mucilaginous fiber.

Buriti provides the second highest beta-carotene concentration of any fruit after gac, delivering 2,860 mcg per 100 grams from an Amazonian palm that most people outside Peru and Brazil have never encountered. Ichigo strawberry contains fisetin, a compound with clinical trial potential for clearing the senescent cells that accumulate with aging. Ice cream bean tastes like vanilla soft-serve and grows on a nitrogen-fixing tree that sustains Amazonian cacao farming.

The I list proves once more that the most significant nutritional story is rarely in the most familiar fruit.

All nutritional values are approximate and based on USDA FoodData Central data and available scientific literature. Values for exotic or tropical fruits may vary by variety, ripeness, and growing conditions.