Deep Sleep Could Shield Memory From Alzheimer's-Related Decline

In a study of 62 older adults, more non-REM deep sleep was linked to better memory performance even in people with Alzheimer’s-like brain changes, suggesting deep sleep may buffer against cognitive decline independent of education or activity. The findings highlight sleep quality as a potentially modifiable risk factor, though long-term studies are needed and sleeping pills may not offer the same benefit. Lifestyle tweaks to improve sleep—like avoiding late caffeine, exercising, limiting screens, and a warm pre-bed routine—could help preserve memory as we age.