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30 min in midday sun can produce 10.000-20.000 IU. It's big but not outlandish. One time mega-dose safety is established at 10.000 IU/kg for infants and toddler
by JanSt 6y ago
30 min in midday sun can produce 10.000-20.000 IU. It's big but not outlandish. One time mega-dose safety is established at 10.000 IU/kg for infants and toddlers [1]
[1] https://pubmed.ncbi.nlm.nih.gov/19506025/ https://pubmed.ncbi.nlm.nih.gov/19506025/
- Filligree 6y agoNote, before you assume this means high doses are always safe: Synthesis of vitamin D will stop once your body thinks you have enough. It isn't capable of ceasing absorption through the digestive system in the same way. That said, constant supplementation of a medium dose -- say, 8000-1000 IUs daily -- should be mostly safe, and probably a good idea.
- neuronic 6y agoThe body regulates vitamin D production from sunlight exposure. It cannot regulate orally taken vitamin D because by the time you absorb the supplemented vitamin D you have surpassed the regulation step. You cannot get too much vitamin D from sunlight but you sure as hell can overdose by taking it orally.
- JanSt 6y agoI should have probably been more precise but that is what I tried to say: one time mega doses are safe and your body is able to produce big quantities even through short sun exposure. That doesn't take from the fact that you shouldn't take those mega-doses multiple times in short course.