What is the primary function of insulin?

The primary function of insulin is to reduce blood sugar levels. Insulin is a hormone produced by the pancreas that plays a critical role in glucose metabolism. When we consume food, particularly carbohydrates, the glucose from this food enters the bloodstream, leading to an increase in blood sugar levels. In response, the pancreas secretes insulin, which helps cells throughout the body absorb glucose. This process not only lowers blood sugar levels but also enables the body to use glucose for energy or store it for future use in the form of glycogen in the liver and muscles.

Insulin thus plays a vital role in maintaining homeostasis in blood glucose levels and preventing conditions such as hyperglycemia.