Ingredients
Banaba Leaf: Evidence, Corosolic Acid & Safety
A conservative guide to banaba leaf, corosolic acid and the gap between mechanistic interest and product-level proof.
Health note: This page is educational and does not diagnose, treat, cure or prevent disease. Supplements can interact with medicines and may not be appropriate for everyone. If you use glucose-lowering medication, are pregnant or breastfeeding, or have a medical condition, discuss supplements with a qualified health professional.
What is banaba?
Banaba (Lagerstroemia speciosa) is a botanical frequently marketed in metabolic-health formulas. Corosolic acid is one of its best-known constituents.
Evidence questions to ask
When reading studies, check the extract, standardization, dose, participant population and outcome. A mechanistic claim about glucose uptake does not establish that every banaba-containing product produces a clinically meaningful effect.
Combination formulas
In a multi-ingredient supplement, both efficacy and safety depend on the complete formulation—not the reputation of one ingredient.
Related: BloodArmor ingredients · How to choose a supplement
Sources & further reading