Glucagon in the gut – brain axis

The intricate relationship between the gut and the brain has long captured the imagination of scientists, philosophers, and clinicians alike. Over the past few decades, research has unveiled a complex and bidirectional communication network that connects these seemingly distinct organs, giving rise to the concept of the gut–brain axis. This axis represents a dynamic and multifaceted system through which the gut and the brain exchange signals, impacting not only digestive processes but also a wide array of physiological and neurological functions. From influencing appetite and mood to playing a role in metabolic regulation, the gut–brain axis has emerged as a crucial nexus in understanding human health and well-being. This chapter delves into the intricate mechanisms that underlie the gut–brain axis, exploring its components and pathways with a special focus on the role played by glucagon. By unraveling the mysteries of this axis, we gain valuable insights into how our body’s diverse systems collaborate to maintain a delicate balance and how disturbances within this axis can contribute to a range of health conditions.