Green coffee and green tea as alternative medicines for the treatment of hyperglycemia

Diabetes is a chronic metabolic disorder characterized by the body's inability to regulate blood glucose levels effectively. An autoimmune disease known as type 1 diabetes occurs when the immune system erroneously targets and kills beta cells in the islets of the pancreas. Insulin resistance, a condition in which the body's cells do not adequately respond to insulin, causes type 2 diabetes. As the available hypoglycemic drugs exhibit several side effects, it is important to search for natural remedies to treat hyperglycemia in diabetic patients. The unroasted coffee beans used to make green coffee are rich in chlorogenic acid, a polyphenol with antioxidant effects and several biological activities. According to previous studies, chlorogenic acid improves insulin sensitivity, glycemic management, and glucose metabolism. Similarly, green tea is rich in catechins, particularly epigallocatechin gallate (EGCG), which exhibits several biological properties. Numerous studies have revealed that EGCG may help to enhance insulin sensitivity, insulin secretion, and glucose management. However, more research is required to determine the molecular mechanisms by which these phytochemicals in green tea and green coffee ameliorate the development of hyperglycemia and improve insulin sensitivity.