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From Skin to Brain: In Search of Plausible Messengers

Gerhard Meisenberg


In this comment on the target article by Federico Leon and Mayra Antonelli-Ponti, I examine whether there are any known mechanisms through which effects of UV radiation on the skin can possibly induce changes in the brain. The conclusion is that several possible mechanisms exist. However, this does not imply that UV radiation does indeed induce important effects on human behavior, and there is evidence contradicting the importance of such effects for society-level outcomes.

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