Jambolan (Syzygium cumini)

Tier 4 — risky / avoid · Ayurvedic · Glucose · Limited evidence

Ayurvedic seed extract used historically for diabetes; some animal and small open-label data suggest mild fasting-glucose lowering. Modern high-quality RCT evidence is sparse. May add to hypoglycaemic effect of antidiabetics — caution required. Standardisation is poor across products.

Dose: ~5 g powdered seed/day or extract per label (variable)