Phyllanthus Emblica
Commonly called Amla.
It enhances the functioning of insulin, reducing insulin resistance and activates the insulin-signaling pathway,
https://link.springer.com/article/10.1007/s00394-020-02471-2
https://www.sciencedirect.com/science/article/pii/S2667031321001263
https://www.tandfonline.com/doi/abs/10.3109/09637486.2011.560565
Ellagic acid in Emblica officinalis exerts anti-diabetic activity through the action on β-cells of pancreas.