What is the primary function of insulin in the body?

The primary function of insulin in the body is to regulate blood glucose levels. Insulin is a hormone produced by the pancreas, and its main role is to facilitate the uptake of glucose from the bloodstream into the cells, particularly muscle and fat cells. This process helps to lower blood glucose levels after meals, ensuring that the body has a steady supply of energy while preventing hyperglycemia (high blood sugar levels).

When glucose enters the cells, it can be used immediately for energy or stored as glycogen in the liver and muscles for later use. Insulin also plays a role in converting excess glucose into fat when energy needs are met and glycogen stores are full. This regulation is crucial for maintaining metabolic homeostasis and ensuring the body functions optimally.