Sleep Health

A Pediatrics study of 401,000 U.S. students found that teen sleep has hit a 30-year low, with just 22% of 18- and 19-year-olds getting seven or more hours per night. Racial and socioeconomic disparities in sleep duration have grown significantly since the early 1990s.

A meta-analysis of 35 studies involving 887 participants found that a single night of poor or missed sleep does not raise inflammatory markers, but three or more consecutive nights of roughly four hours of sleep significantly increases interleukin-6 and C-reactive protein levels in the blood.

A massive Nature study using 23 biological aging clocks found that both short and long sleep accelerate aging across the brain, heart, lungs, and immune system, with the optimal window varying by organ and sex.

A study of 3,231 Finnish adults tracked over a decade found that people with highly irregular bedtimes faced roughly twice the risk of heart attack or stroke — but only if they also slept less than eight hours. Wake-up time variability showed no link to cardiac events.

A randomized trial of 78 early-morning shift workers found that solriamfetol significantly improved alertness, work performance, and daily functioning — the first time any treatment has been tested for this common but overlooked form of shift work disorder.

A 2024 laboratory study found undisclosed pharmaceuticals, an herbicide, and industrial chemicals in commercially sold melatonin vapes. One device appeared to contain no melatonin at all. Federal regulators have known this product category exists for years. No enforcement action has been taken against any of the major brands currently on the market.

A prospective study of 85,618 UK Biobank participants finds that people who naturally rebound after short sleep have lower mortality risk than those who do not — and that severe restriction without recovery raises death risk by up to 38%.

A Mass General Brigham study tracking 1,338 older adults for up to 19 years found that frequent napping, particularly in the morning, was associated with significantly higher mortality risk.

UC Berkeley researchers have mapped the brain circuits that control growth hormone release during sleep, revealing a feedback system that explains the links between poor sleep and metabolic disease — and opening new avenues for treatment.

A global study of Samsung Health users released for World Sleep Day found that 23% of participants showed signs of sleep apnea risk, with the condition silently robbing sufferers of deep sleep and REM sleep every night.

A new study from Oregon Health & Science University found that regularly getting less than seven hours of sleep is more strongly associated with shorter lifespan than poor diet, lack of exercise or social isolation.

The latest generation of sleep technology moves beyond wristbands to capture data you never knew you needed.