Other research conducted at the same institute studied possible regeneration of the islets of langerhans in rats that were made diabetic for the study and then given gymnema sylvestre leaf extracts. The diabetic rats were able to double the number of their islets and beta cell numbers. Researchers felt that the herbal therapy was able to bring blood sugar stability by repairing the pancreas and increasing insulin secretion.

Normally, blood glucose levels are tightly controlled by insulin, a hormone produced by the pancreas. Insulin lowers the blood glucose level. When the blood glucose elevates (for example, after eating food), insulin is released from the pancreas. This release of insulin promotes the uptake of glucose into body cells. In patients with diabetes, the absence of insufficient production of or lack of response to insulin causes hyperglycemia. Diabetes is a chronic medical condition, meaning that although it can be controlled, it lasts a lifetime.