Insulin is a pancreatic hormone that plays an essential role in regulation of blood glucose as well as lipid and carbohydrate metabolism. Both natural and recombinant forms of insulin are used therapeutically to treat type 1 diabetes. While insulin itself is not hepatotoxic and has not been linked to serum enzyme elevations or instances of clinically apparent liver injury, high doses including overdoses of insulin and glucose can result in hepatic glycogenosis and serum aminotransferase elevations.