New Delhi, June 7 -- NEW DELHI - The black plum season in India runs roughly six weeks, from late May to early July, before the fruit vanishes from roadside carts and market stalls until the following monsoon. For most of the country's 101 million diagnosed diabetics, those weeks pass without a doctor ever mentioning the fruit.

That silence is not easily explained by the science. Jamun, known botanically as Syzygium cumini and recorded in Ayurvedic pharmacopeias dating back to the Charaka Samhita, has accumulated a substantial body of pharmacological evidence linking its seed compounds to measurable improvements in blood glucose regulation. A study published in Food Science & Nutrition in May 2025, examining a low-calorie jamun drink in ...