How does poor sleep affect your overall health long term?

Poor sleep over time significantly raises the risk of serious chronic conditions including heart disease, high blood pressure, type 2 diabetes, and obesity. When you consistently don't get enough quality sleep, your body produces more stress hormones like cortisol, increases inflammation, and disrupts insulin regulation, all of which damage cardiovascular and metabolic health. Long-term sleep deprivation also impairs immune function, making you more vulnerable to illness, and is strongly linked to mental health disorders including depression and anxiety. Research increasingly connects chronic poor sleep to a higher risk of cognitive decline and dementia. Essentially, sleep is when your body repairs itself, so consistently cutting it short accelerates cellular damage and shortens overall healthspan.