sleep
How to sleep better comes down to a short list with real trial support: a fixed wake time, morning daylight, CBT-I for chronic insomnia, and a realistic view of what supplements can do. Every Lifebar sleep briefing is collected here.
15 briefings
Magnesium citrate is well absorbed, but the one sleep trial that used it found no benefit over placebo. The best magnesium sleep results used other forms, and citrate has a laxative effect that is unwelcome at bedtime.
How to fix sleep schedule drift: pick one wake time and hold it. A 60,000-person UK Biobank analysis found bedtime consistency tracked survival more closely than how long people slept.
How to fix circadian rhythm problems starts outdoors. Light in the first hour after waking is 10 to 100 times brighter than your living room, and it sets the clock that decides when you feel sleepy.
Does alcohol affect sleep? It shortens the time it takes to fall asleep, then suppresses REM and fragments the second half of the night. The trade is a bad one.
The magnesium benefits that hold up are muscle cramps, migraine and blood pressure. The evidence for magnesium as a sleep aid is thin outside of deficiency.
Does magnesium help you sleep? Modestly, and mostly if you are low to begin with. Here is what the trials measured, and which form is worth taking.
The best magnesium for sleep is glycinate: well absorbed, gentle on the gut, and the only form with its own placebo-controlled sleep trial. Oxide absorbs worst. Four common forms compared. Four common forms compared.
Brown noise for sleep emphasises the low frequencies, which most people find easier to sleep through than white or pink. The colours describe how sound energy is spread across the spectrum.
Chamomile tea for sleep produces modest improvements in sleep quality in trials, mostly in postpartum women and older adults. The bedtime routine may matter as much as the apigenin.
The natural sleep aid with real evidence is CBT-I, followed by light exposure and a fixed schedule. Melatonin shifts timing more than it deepens sleep, and most herbal aids sit close to placebo.
How much deep sleep do you need? Most healthy adults spend 13 to 23% of the night in slow-wave sleep, roughly 60 to 110 minutes. It falls with age, and chasing a wearable number is usually counterproductive.
Is 6 hours of sleep enough? For roughly 99% of adults, no. Performance keeps degrading on six hours while subjective sleepiness plateaus, which is why short sleepers feel fine and test badly.
What is sleep paralysis? The muscle atonia of REM sleep persisting a few seconds into waking. It is harmless, common, and strongly linked to irregular schedules and sleep deprivation.
Home testing for sleep apnea is accurate for moderate to severe obstructive sleep apnea in otherwise healthy adults. A negative result with ongoing symptoms still needs a lab study.
The sleeping disorder therapy with the strongest evidence is CBT-I. Cognitive behavioural therapy for insomnia outperforms sleeping pills at follow-up and is recommended before medication in every major guideline.
