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Under 60, too.

The fear of overdose is misfounded, IMHO. You have to try really hard. Deficiency, on the other hand, is endemic.

"Vitamin D deficiency is a major public health problem worldwide in all age groups, even in those residing in countries with low latitude, where it was generally assumed that UV radiation was adequate enough to prevent this deficiency, and in industrialized countries, where vitamin D fortification has been implemented now for years."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4018438/




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