We spend hours counting steps, tracking calories and monitoring our heart rate, but rarely think about the organ that controls every thought, memory, emotion and movement: the brain.
On World Brain Day, neurologists are warning that while people are living longer, their brains are increasingly under assault from poor sleep, chronic stress, diabetes, obesity, pollution and excessive screen time.
The World Federation of Neurology marks World Brain Day every year on July 22 to raise awareness about neurological health. According to the World Health Organization, neurological disorders are now among the leading causes of disability and ill health globally, affecting more than one in three people during their lifetime. In India, the burden is rising steadily as the population ages and lifestyle diseases become more common.
"The biggest misconception is that brain diseases only affect the elderly," says Dr Sudheer Ambekar, neurologist at Jaslok Hospital. "We are seeing younger adults with stroke, memory problems, chronic migraines and sleep-related cognitive issues. Brain health begins decades before symptoms appear."
One of the strongest risk factors is poor metabolic health. Conditions such as diabetes, hypertension and obesity damage blood vessels that supply the brain, increasing the risk of stroke and vascular dementia. Studies have also linked uncontrolled blood sugar to faster cognitive decline. At the same time, untreated hearing loss, depression, physical inactivity and social isolation have emerged as important modifiable risk factors for dementia.
Sleep is another overlooked pillar of brain health. During deep sleep, the brain clears waste proteins that, when allowed to accumulate over time, are associated with Alzheimer's disease. Persistent sleep deprivation can impair concentration, memory and emotional regulation even in young adults.
Experts are also raising concerns over chronic stress. Prolonged exposure to stress hormones can affect brain regions involved in memory and decision-making, while anxiety and depression further increase the risk of cognitive impairment if left untreated.
The good news is that many neurological diseases can be delayed or even prevented through healthy habits. Regular physical activity improves blood flow to the brain, while a diet rich in fruits, vegetables, whole grains, nuts and healthy fats supports cognitive function. Controlling blood pressure, blood sugar and cholesterol, avoiding tobacco, limiting alcohol, getting seven to eight hours of quality sleep and staying mentally and socially active all contribute to better brain health.
"Think of the brain the way you think of your heart," says Dr Ambekar. "You don't wait for a heart attack before taking care of your cardiovascular health. The same approach should apply to your brain."
As India witnesses a rapid rise in non-communicable diseases and an ageing population, neurologists believe brain health must become a public health priority rather than an afterthought. Because protecting the brain is not just about preventing disease in old age—it is about preserving the quality of every stage of life.
