If I’m doing the math right the LD50 for humans taking Vitamin D is about 700,000 I.U. per pound of body mass, e.g. 100 million I.U. for an average person
but that’s still only 2½ grams 
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If I’m doing the math right the LD50 for humans taking Vitamin D is about 700,000 I.U. per pound of body mass, e.g. 100 million I.U. for an average person
but that’s still only 2½ grams
