Black jamun, also known as Jambolan, Indian blackberry, Java plum, or black plum, is a popular fruit in India and Southeast Asia, according to the CK Birla Hospital. It's a small, dark purple fruit with a sweet and tangy flavour, often leaving a slightly astringent aftertaste. Beyond its taste, it's highly valued for its nutritional and medicinal properties. Here's a breakdown of its nutritional value per 100 grams, according to PharmEasy:
Jamun is also rich in anthocyanins, ellagic acid, glucoside, isoquercetin, kaemferol, and myrecetin.

Health benefits

• Diabetes management: Jamun may help regulate blood sugar levels by slowing down the conversion of starch into sugar and enhancing insulin sensitivity. The seeds contain compounds like jamboline and jambosine that contribute to this effect. 
•  Aids digestion: Jamun's high fiber content can help prevent constipation and improve digestion. Its astringent properties can also help treat diarrhea and stomach ulcers. 
• Boosts immunity: The abundance of vitamin C and antioxidants in jamun can help strengthen the immune system and fight off infections. 
•  Promotes cardiovascular health: Jamun's potassium content may help regulate blood pressure and counter the effects of sodium, notes CK Birla Hospital. Its antioxidants can help reduce cholesterol levels and reduce the risk of heart disease. 
• Enhances skin and hair health: The antioxidants and vitamin C in jamun can help reduce signs of aging, promote collagen production, and reduce acne and pimples. Applying jamun pulp or seed powder is also used in face masks to reduce breakouts. 
•  Improves liver function: Jamun may help detoxify the liver and repair liver cells, according to ResearchGate. 
•  Supports weight management: Being low in calories and high in fibre, jamun can promote a feeling of fullness and help control weight. 
•  Maintains oral health: Jamun's antibacterial properties can help fight bad breath, reduce gum bleeding, and maintain overall dental hygiene. 
•  Increases haemoglobin levels: The iron and vitamin C in jamun may help boost hemoglobin production, beneficial for those with anemia or jaundice.