Sleep is something many people overlook, but new research suggests it may play a much bigger role in brain health than previously thought.
A recent study found that poor sleep patterns can directly impact how the brain functions — and may increase the risk of developing dementia over time.
Researchers focused on how sleep affects the brain’s “glymphatic system,” which helps clear out waste and harmful proteins while you rest.
When sleep is disrupted, this system becomes less effective, allowing toxic proteins like amyloid and tau — both linked to Alzheimer’s disease — to build up.
Over time, that buildup may contribute to cognitive decline and increase the likelihood of dementia.
The study also found connections between poor sleep, high blood pressure, and other health factors that can further affect brain health.
Importantly, experts say sleep is one of the few modifiable risk factors, meaning improving sleep habits could help reduce long-term risk.
Other research has also shown that getting too little — or even too much — sleep is linked to early signs of brain changes associated with dementia.
While scientists are still studying the exact relationship, the evidence continues to point to one clear takeaway: sleep is critical for protecting the brain as we age.
