Andrew Huberman· PhD
The late evening and nighttime increase in melatonin supports proper transition into deep sleep.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
The late evening and nighttime increase in melatonin supports proper transition into deep sleep.
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You know, during the day, you want daylight to come in and force you all the way on to the on switch and you're active and awake. And then at night, you want the signal of darkness to come in to trigger the release of a hormone called melatonin to shift you all the way into the off position so you go into deep sleep and a sound sleep.
The first is darkness. You really do need some degree of darkness at night to release that hormone melatonin, which helps trigger the timing of the healthy onset of sleep.