The nightcap illusion: what alcohol does to your sleep and recovery
A drink shortens the felt distance to sleep and lengthens the real distance to recovery. What pooled sleep-lab...
Longevity & Supplement Guides
Evidence-scored guides to supplements, biomarkers, and daily protocols. Written the way we score our products: honestly.
Showing 9 guides tagged “Sleep”.
The Light You Live In: Bright Days, Dark Nights, and Your Body Clock
The brightness of your days and the darkness of your nights is a longevity lever hiding in plain...
Are Naps Good or Bad? What the Newest Research Actually Says
Two 2026 headlines said opposite things about napping. The research resolves it — and points somewhere more useful:...
The Night Shift: What Deep Sleep Does to Your Body
Scientists just mapped the brain circuit that releases growth hormone during deep sleep. Here is what it means...
Sleep Regularity vs Duration: Why Consistency May Matter More
A large wearable study found sleep regularity predicts mortality better than sleep duration. Why keeping a consistent schedule...
Caffeine and Sleep: Why the Afternoon Cup Matters
Caffeine masks tiredness rather than removing it, and with a 5–6 hour half-life an afternoon coffee can still...
Sleep Stages Explained: Light, Deep, and REM
Sleep is a structured cycle of light, deep and REM stages, each doing different work — deep sleep...
Circadian Rhythm: How Light Sets Your Body Clock
Your body runs on a clock that expects a regular day, and light is the signal that sets...
Sleep Is a Cooling Problem: The Case for a Colder Bedroom
Air conditioning built modern Singapore. The same physics runs your night. Why your core has to cool to...
