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While “screen time” before bed has recently been thought to disrupt natural circadian rhythms, it’s still a bit murky as to how much disruption the light from smartphones and tablets can cause. A new study finds that blue light is not clearly worse for sleep than other forms of light. ....
Being sedentary for 10 hours or more each day is "significantly associated" with an increased risk of dementia, new research shows. Here's more on how time spent sitting down can affect your cognitive health. ....
Researchers say they have linked shorter telomeres on white blood cells to higher dementia risk, although outside experts say there are limitations to this study ....