Trigonella Foenum-Graecum
Commonly called Fenugreek.
The fenugreek flavonoids lowered insulin resistance, improved glycolysis, and gluconeogenesis, and protected pancreatic islet cells from damage.
https://www.tandfonline.com/doi/full/10.3109/13880209.2013.826247
Preventive and curative effect of Trigonella Foenum-Graecum L. seeds in C57BL/6J models of type 2 diabetes induced by high-fat diet.
https://www.sciencedirect.com/science/article/abs/pii/S0378874112003388