What is the main role of the liver in the body?

The main role of the liver in the body is the removal of toxins and waste. The liver functions as a critical organ in detoxifying the blood by filtering out harmful substances, such as drugs and alcohol, and processing metabolic waste products. It plays a vital role in maintaining overall homeostasis by regulating the levels of various chemicals in the blood and converting waste into urea, which is then excreted by the kidneys.

While the liver is involved in digestion by producing bile, its primary and most essential function goes beyond merely breaking down food; it is intricately linked to detoxification processes. Similarly, although the liver has some role in hormone production, such as producing insulin-like growth factor and various other hormones, this is not its main function. Furthermore, controlling body temperature is not a role that the liver directly fulfills; it is primarily managed by the hypothalamus and the skin. Therefore, the liver's critical involvement in removing toxins and metabolic waste is what underscores its importance in maintaining the body’s internal environment and overall health.