What happens to your body when you are chronically sleep-deprived?

Chronic sleep deprivation triggers a cascade of harmful effects throughout the body. Cognitively, it impairs memory consolidation, decision-making, reaction time, and emotional regulation, as the brain cannot properly clear metabolic waste products like amyloid beta, which is linked to Alzheimer's disease. Hormonal disruption is significant: cortisol rises, while leptin drops and ghrelin increases, driving hunger and weight gain. The immune system weakens, making you more susceptible to illness. Cardiovascular risk increases substantially, with higher rates of hypertension, heart disease, and stroke among chronically sleep-deprived individuals. Blood sugar regulation suffers, raising the risk of type 2 diabetes. Over time, chronic sleep loss is also associated with reduced life expectancy and increased risk of depression and anxiety disorders.