Professor Neil Walsh and his team at Liverpool John Moores University have established that people who are dehydrated have higher spikes of cortisol during stressful situations. And these findings, published in the Journal of Applied Physiology, suggest that over the long term, dehydration could have important implications for chronic diseases that are associated with heightened stress responses over time, including depression, anxiety disorders, heart disease, and diabetes.
Cortisol is essential for biological processes, helping manage stress responses, regulating blood sugar, modulating inflammation, and supporting metabolism and immune responses.