The Gut Brain Axis refers to the bidirectional communication network between the gastrointestinal tract and the brain. This connection involves various pathways, including the nervous system, hormones, and immune responses. The gut microbiome, which consists of trillions of microorganisms, plays a crucial role in this interaction, influencing mood, behavior, and overall health. Research indicates that the gut can affect brain function and vice versa. For example, stress can alter gut health, while gut bacteria can produce neurotransmitters like serotonin, which impacts mood. Understanding this axis may lead to new treatments for conditions like anxiety and depression.