The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
one of the things that a rexin does as a chemical so these neurons are sensing neurons but they are also neurons that will release the chemical contained inside of them which is called erectin why is this important erectin as a chemical is a wake promoting chemical when you release and dump erection into the brain and the body it wakes the brain up it's an alerting chemical and normally it shuts down at night and that's part of the mechanism of what we call the sleep wake switch
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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many of our hormones and our chemicals erection included seem to be under the control of our 24-hour circadian rhythm and that's regulated by another part of the brain very close to the hypothalamus in fact it sits very close to the hypothalamus called the suprachiasmatic nucleus which is the central master clock of the brain and that regulates the release of other things like melatonin from the pineal gland and therefore the instruction is given out as to when to release wake promoting chemicals like erection and when to release sleep-promoting chemicals
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.