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TL;DR: Researchers used wrist trackers to estimate the sleep stages of 95,559 British adults, then followed their hospital records for about 9 years. Adults who spent more time in REM sleep had lower risk of 83 different diagnoses, and adults sleeping under 5…
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TL;DR: A 2026 Research Square preprint followed 120 college students with a smartphone app and found that a higher share of positive emoji check-ins was the most consistent digital marker tied to lower depression, lower anxiety, and higher flourishing. Key Fin…
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Insomnia and daytime napping are causally associated with an increased risk of major depressive disorder (MDD), while sleep duration influences the risk of schizophrenia and attention-deficit/hyperactivity disorder (ADHD). Highlights: Major Depressive Disorder…
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A new study published in BMC Psychiatry has found that short sleep duration is associated with increased risk of suicidal ideation and behavior among American adolescents. Findings indicate that suicide rates have been rising across all racial groups since 200…
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A new Canadian study suggests fluoride exposure may be associated with sleeping fewer hours than recommended for optimal health. Key findings include: Higher levels of fluoride in tap water were associated with a 34% increased risk of sleeping less than recomm…
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Trouble sleeping may raise your risk of dementia later in life, according to a new 19-year study of over 22,000 middle-aged and older adults in Sweden. Both insomnia symptoms and shorter sleep were linked to higher chances of developing dementia down the road.…
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