The human organ responsible for producing insulin is the pancreas. This organ plays a crucial role in the endocrine and digestive systems. Insulin is a hormone that regulates blood glucose levels by facilitating the uptake of sugar into cells for energy or storage. The pancreas contains clusters of cells known as islets of Langerhans, where insulin is synthesized and released. An imbalance in insulin production can lead to conditions such as diabetes, which affects millions of people worldwide. Managing insulin levels is essential for maintaining overall health and metabolic function.