Our body’s main stress hormone, cortisol, can actually shrink our brain when it stays high for too long. Most people think stress just makes us feel bad temporarily, but science shows something much more serious. The constant presence of stress hormones like cortisol creates dangerous changes throughout our body and mind. These changes affect everything from our heart’s health to how well we remember things. Cortisol is a hormone that kicks in during stressful times to help restore energy we use up while dealing with stress. But when stress doesn’t go away, high cortisol levels start damaging blood vessels, push blood pressure up, and make heart attacks and strokes more likely. On top of that, long-term stress ties closely to anxiety, depression, and PTSD. The effects get worse – ongoing stress speeds up brain aging and makes us more likely to develop serious brain diseases like dementia and Alzheimer’s. This piece dives into the hidden science of how cortisol changes our brain chemistry and what steps we can take to shield our mental health from its damaging effects. What Does Cortisol Do in the Brain? Photo by Uday Mittal on Unsplash. Image Source: Leagrave Therapy Clinic Cortisol affects our brain chemistry through specific pathways that go beyond its role in stress response. This hormone travels through the bloodstream and can easily cross the blood-brain barrier. This allows…