alt Hacker NewsBeing at the beach (in summer) for a half an hour will produce 10,000 and 25,000 IU for the average european.
See: Vitamin D and health: evolution, biologic functions, and recommended dietary intakes for vitamin D (293 citations)
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zelphirkalt • yesterday at 11:31 AM
So? What's your claim here? Are you claiming that our skin works the same way as our digestive system? That would be a ridiculous claim. And fyi, many people get a proper sunburn, if they stayed in the sun for 30 min straight without protection, at least in summer. So your 30 min statistic doesn't really tell us anything about something being healthy or not.
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Could you cite that claim from the paper?