A Warm Bath Before Bed: Heat Up to Cool Down
A warm bath helps sleep for a reason that runs backwards: it makes you shed heat faster. The...
Longevity & Supplement Guides
Evidence-scored guides to supplements, biomarkers, and daily protocols. Written the way we score our products: honestly.
Showing 21 guides tagged “Sleep”.
Your dinner moved your deep sleep by two and a half minutes
The headline says eat more protein and fibre and you will sleep better. Two papers sit underneath it:...
Pink Noise and Deep Sleep: It Was Never About the Sound
A new MIT study moved cerebrospinal fluid with 50-millisecond bursts of pink noise. The finding that matters is...
Who decided you need eight hours of sleep?
The eight-hour night was a factory-reform slogan before it was a health rule — and the evidence has...
Sleep Inertia: Why You Can’t Think for the First Twenty Minutes
Morning grogginess is a measurable brain state with a published timecourse — and it lasts longer than it...
6.4 to 7.8 Hours: The Sleep Window That Isn’t a Target
A Nature study built 23 biological ageing clocks and found a U-shaped link with sleep duration. The headline...
How REM sleep was discovered — and how it became a number on your wrist
In December 1951 a broke graduate student wired his sleeping eight-year-old son to a machine nobody else wanted,...
Can You Catch Up on Sleep? What Recovery Sleep Actually Repays
The weekend patch is the most widely practised sleep intervention in the world. The evidence says it gives...
Is Yoga Really the Best Exercise for Sleep?
A headline ranking yoga first for sleep is doing the rounds again. Three network meta-analyses have now asked...
Exercise and the Brain's Night Shift: What the Glymphatic Research Actually Says
A review this month put "exercise helps the brain take out the trash" into every feed. The mechanism...
Bedroom Air Quality and Sleep: The Free Variable Nobody Measures
We measure the sleeper in exquisite detail and ignore the sealed room they spend eight hours in. What...
One Number for a Whole Night: What an AI Found in 10,000 Sleep Studies
A new Nature Communications model read the raw signals from more than 10,000 overnight recordings and found a...
