How Chronic Stress Increases Risk of Depression

Chronic stress triggers a neutrophil invasion into brain-protective layers, driving depression-like behaviors through immune activation rather than just hormonal changes Stress-induced immune signals hijack brain reward circuits, reducing dopamine and shifting neural activity toward threat detection over pleasure-seeking behaviors Prolonged stress damages brain mitochondria, reducing cellular energy production while creating an inflammatory feedback loop that worsens mood and cognitive function Interferon pathways and inflammatory cytokines like IL-6 cross into the brain, directly altering neuron firing patterns in emotional regulation centers Natural interventions including healthy carbohydrates, regular exercise, positive thinking, creativity, and physical touch help counter stress-induced immune activation and protect mental health