Gut health significantly impacts mood regulation due to the gut-brain axis, a bi-directional communication system linking the gut and the brain. A healthy gut microbiome can produce neurotransmitters like serotonin, influencing mood and emotional well-being. Imbalances in gut bacteria may lead to mental health issues such as anxiety and depression. Fermented foods, probiotics, and a balanced diet rich in fiber promote gut health, subsequently enhancing mood and cognitive function.