I am sick of people rejecting good evidence about vitamin D because they are confused about the bad evidence and can't be bothered to investigate, so I am going to explain it.
Let's look at this like a 19th century physician who woke up from a coma this morning to trawl the public internet for info (I helped), knowing about evolution and bodies and counting and skepticism but not about "metastudies" or "scientific consensus" or "USDA guidelines." How much vitamin D do we need?
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