US doctor warns chronic stress can speed up aging and harm the brain

Post by : Saif Nasser

Chronic stress is often discussed as a mental and emotional burden, but a US doctor has warned that its impact goes much deeper. Long-lasting stress can silently harm the body at the cellular level, speed up aging, and weaken the brain. Dr Kunal Sood, an anesthesiologist and interventional pain specialist, explained in a recent video that when cortisol, the body’s main stress hormone, stays high for too long, it triggers changes that make the body age faster from the inside.

He said that many people think stress only affects mood or heart health, but it actually damages cells and reduces the body’s ability to repair itself. When stress becomes chronic, it increases oxidative stress, which harms DNA and interrupts normal cell division. Damaged cells survive longer and the protective caps of chromosomes, known as telomeres, begin to shorten. Shorter telomeres are linked to faster aging and higher disease risk. According to Dr Sood, individuals under constant pressure show higher levels of DNA damage than those with healthier stress levels.

The effects do not end there. High cortisol also changes the way the body stores fat. It encourages the buildup of visceral fat, which is the deep fat that surrounds internal organs. This kind of fat is linked to insulin resistance, heart disease, and inflammation. Dr Sood noted that research from Harvard shows a clear connection between higher levels of belly fat and reduced brain volume, especially in areas that control memory.

Long-term stress harms the brain in additional ways. Dr Sood explained that high cortisol interferes with DNA repair inside brain cells, which may lead to structural changes in the hippocampus and prefrontal cortex. These are the regions responsible for memory, learning, decision-making, and emotional control. Over time, chronic stress can cause these brain areas to shrink, making it harder for people to think clearly or remember information.

Dr Sood’s message is a reminder that managing stress is not only about emotional comfort but also about long-term physical health. Uncontrolled stress affects the body from the deepest levels, shaping how we age and how well our brain functions. Experts recommend simple habits such as regular physical activity, better sleep, mindfulness practices, and seeking support when needed. Reducing stress is not just a lifestyle choice; it is a necessary step to protect the body and mind from long-lasting harm.