The Gut–Brain Connection: Why Gut Health Matters for the Mind

The gut–brain axis is a dynamic and bidirectional communication system between the gastrointestinal tract and the central nervous system (CNS).¹

This communication takes place through various bodily “pathways,” with the vagus nerve playing a central role, as it functions as a direct line of connection between the gut and the brain. ² Hormones, the immune system, and specific substances produced in the gut also play an important role. ³

These substances are mainly derived from the gut microbiome, more precisely from the “beneficial” bacteria, as well as from the intestinal cells themselves. Together, all these factors influence mood, stress levels, and overall brain function. ⁴

When the gut functions properly and the microbiome is in balance, the signals sent to the brain are more “positive,” contributing to better mood, greater resilience to stress, and clearer thinking. In contrast, impaired gut function can intensify anxiety, fatigue, and emotional instability. ⁵

The important point is that we ourselves can positively influence the gut–brain axis. Through a balanced diet rich in dietary fibre and foods that support the microbiome, proper stress management, adequate rest and hydration, as well as regular physical activity, we can enhance healthy gut function. In this way, we indirectly support brain function as well, demonstrating that caring for our physical and mental health are closely intertwined. ³˒⁶

References

  1. Carabotti, Marilia, et al. “The gut-brain axis: interactions between enteric microbiota, central and enteric nervous systems.” Annals of gastroenterology: quarterly publication of the Hellenic Society of Gastroenterology2 (2015): 203.
  2. Kahraman, Sevde, Cemanur YAZICI, and Fatma ÇELİK. “Vagus Nerve Function in Gut-Brain Communication.” International Journal of Basic and Clinical Studies1 (2025): 34-55.
  3. Mayer, Emeran A., et al. “Gut microbes and the brain: paradigm shift in neuroscience.” Journal of Neuroscience46 (2014): 15490-15496.
  4. Diotaiuti, Pierluigi, et al. “The Gut Microbiome and Its Impact on Mood and Decision-Making: A Mechanistic and Therapeutic Review.” Nutrients21 (2025): 3350.
  5. Foster, Jane A., and Karen-Anne McVey Neufeld. “Gut–brain axis: how the microbiome influences anxiety and depression.” Trends in neurosciences5 (2013): 305-312.

Dalton, Alyssa, Christine Mermier, and Micah Zuhl. “Exercise influence on the microbiome–gut–brain axis.” Gut microbes 10.5 (2019): 555-568.