The organ that produces insulin in the body is the pancreas. This gland, located behind the stomach, plays a critical role in regulating blood glucose levels. When blood sugar levels rise, such as after eating, the pancreas releases insulin into the bloodstream. Insulin facilitates the uptake of glucose by cells, enabling them to use it for energy or store it for future use. In individuals with diabetes, insulin production or function may be impaired, leading to elevated blood glucose levels. Thus, the pancreas is essential for maintaining metabolic health and overall energy balance.