Mangifera sumatrana is a type of mango endemic to Sumatra which has the potential to be a natural anti-diabetic agent. This study aims to evaluate the toxicity of ethanol extract of M. sumatrana leaves on the morphological and histological performance of the liver given alloxan. Ethanol extract of M. sumatrana leaves was administered orally at doses of 500, 1000, 2000, and 4000 mg/kg BW to ma…