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A comment on Vitamin D: Potent regulator of dopaminergic neuron differentiation and function. Parent comment

Re:Vitamin D: Potent regulator of dopaminergic neuron differ... by jessicas_rabbit on Sunday May 28, 2023 @01:30PM (#36106027)
In order to produce vitamin D, your skin needs continuous time in the sun to fully react with sunlight.

30 minutes of continuous chemical reaction will have vastly different effect than a reaction that stops & starts repeatedly, for a sum total of 30 minutes.

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Re:Vitamin D: Potent regulator of dopaminergic neuron differ... by cyberax on Sunday May 28, 2023 @02:42PM (#36106618)
You actually are going to synthesize _more_ vitamin D if you do fractionated exposure.

That's because vitamin D synthesis is an equilibrium reaction, UV drives backward and forward reactions. So you'll get more vitamin D if you expose your skin to the sun for a few minutes, then let the synthesized vitamin to diffuse out of the skin layer, and then expose yourself again.

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Re:Vitamin D: Potent regulator of dopaminergic neuron differ... by jessicas_rabbit on Sunday May 28, 2023 @04:30PM (#36107476)
That makes sense. Thanks for explaining.
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