3min chapter

Huberman Lab cover image

Using Light (Sunlight, Blue Light & Red Light) to Optimize Health

Huberman Lab

CHAPTER

Testasteron Levels Change as a Function of Time of Year

People who had paler skin, or originated from countries where they had less u v b light exposure across the ear, had greater increases in testostrone overall than did people who already were getting a lot of u b b exposure. This study was done on subjects living in the northern hemisphere the entire year. They observed that testosron levels were lowest in the winter months and were highest in the months of june, july, august and september.

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