Insulin plays a vital role in carbohydrate metabolism by regulating blood glucose levels. After consuming carbohydrates, glucose enters the bloodstream, prompting the pancreas to release insulin. This hormone facilitates the uptake of glucose by muscle and fat cells, allowing them to use glucose for energy or store it as glycogen. Insulin also inhibits the production of glucose by the liver, maintaining stable energy levels. Proper insulin function is essential for metabolic health and helps prevent conditions like type 2 diabetes and obesity.