Andrew Huberman· PhD
What's the optimal time to view morning sunlight?
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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.
What's the optimal time to view morning sunlight?
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view sunlight in the am!
I do not wear sunglasses when I do my morning sunlight viewing which I highly recommend everyone do their morning sunlight viewing
What's the optimal time to view morning sunlight?
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.