Can Good Sleep Protect Your Brain From Ageing?
A night of good sleep and brain aging may be more closely linked than we think. While most people associate poor sleep with next-day grogginess, new research highlights a deeper concern: chronic insomnia could speed up how the brain ages over time. Published in Neurology, the study adds to growing evidence that sleep quality plays a critical role in long-term brain health.
Insomnia and the Risk of Cognitive Decline
Researchers followed 2,750 adults over five years, tracking their sleep patterns, brain scans, and cognitive performance. The findings revealed that people with persistent insomnia were 40% more likely to develop cognitive impairment compared to those without sleep problems.
Interestingly, individuals who improved their sleep, whether through lifestyle changes or medication, did not show the same increased risk. Although scientists cannot yet confirm that treating insomnia will fully prevent cognitive decline, the evidence points to sleep as a modifiable risk factor for protecting brain health.
Why Good Sleep Matters for the Brain
Experts emphasise that sleep is more than just rest; it is a biological necessity for the brain. Quality sleep helps:
- Clear out toxic waste proteins linked to Alzheimer’s disease.
- Consolidate learning and memory.
- Maintain emotional balance and overall mental health.
As Dr. Rachel Salas from Johns Hopkins University explains, insomnia affects not only how we function daily but also our long-term risk of neurological disorders.
Insomnia: A Hidden and Undertreated Condition
Despite its impact, insomnia often goes untreated. About 12% of Americans report being diagnosed with chronic insomnia, and older adults are especially vulnerable. Yet, many mistakenly assume that poor sleep is simply part of ageing.
Standard treatment includes cognitive behavioural therapy for insomnia (CBTI), which focuses on reshaping sleep-related habits. Simple strategies like reducing caffeine, limiting screen use before bed, and sticking to a consistent bedtime can also support better sleep quality.
Conclusion
This study underscores a crucial message: good sleep and brain ageing are directly connected. Unlike genetic risk factors, insomnia is something many people can address. While more research is needed, improving sleep today may offer real protection against cognitive decline tomorrow.
Source: Inputs from various media Sources
Conclusion
I’m a pharmacist with a strong background in health sciences. I hold a BSc from Delhi University and a pharmacy degree from PDM University. I write articles and daily health news while interviewing doctors to bring you the latest insights. In my free time, you’ll find me at the gym or lost in a sci-fi novel.
- Health News and Updates,People Forum
- 15 September 2025
- 22:00
