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Vitamin D activating principle of Sunlight?

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  • Vitamin D activating principle of Sunlight?



    Anyone know what part of sunlight activates vitamin D in our bodies? That's probably crappy phrasing, but I guess what I'm wondering is, if I can get a sunburn on a cloudy day, can I get Vitamin D benefits on a cloudy day?


  • #2
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    vitamin D production, as far as I know, is triggered by UVB. If you are at no risk of burning or of at least getting a mild tan, you are very likely not getting enough UVB for vit D production.

    “Every saint has a past and every sinner has a future.” -Oscar Wilde
    "The power of accurate observation is commonly called cynicism by those who have not got it." -George Bernard Shaw
    "The trouble with jogging is that the ice falls out of your glass." -Martin Mull

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    • #3
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      Excellent - So doffing the shirt on a cloudy day is just as good as doing so on a sunny one. That's good to know.


      Because, unlike Mark in sunny CA, Virginia still spends about 1/4 of the year under a pall.

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