Andrew Huberman· PhD
You do want to get sunlight in your eyes as this is the initial step in setting your circadian clocks in your brain and elsewhere.
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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.
You do want to get sunlight in your eyes as this is the initial step in setting your circadian clocks in your brain and elsewhere.
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it's crucially important to allow bright blue light from the Sun or even on an overcast day to enter your eyeballs
So I don't say that going out to the sun is the only way you can do it or should be the only way. I believe in supplementation, I supplement as well. But there is something to be said for getting outside into the fresh air and sunlight and allowing that light to hit the back of your retina. It has wonderful effects in terms of getting your circadian rhythm on sync.
Then, conversely, during daytime, it's very important to get a good dose of bright daylight.