Andrew Huberman· PhD
There's a lot of yellow-blue contrast, and those yellow blues signal important specific sets of cells in your eye and brain that it's morning.
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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.
There's a lot of yellow-blue contrast, and those yellow blues signal important specific sets of cells in your eye and brain that it's morning.
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You want to get so-called low solar angle sunlight. Why? 'Cause of that yellow-blue contrast that we talked about before.
low solar angle sunlight actually has more yellow blue contrast and even though you don't perceive it through these cells you look at it through cloud cover you see that yellow blue contracts is what activates the cells in the retina says it's morning and the sun's overhead
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