The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Vitamin D depends on how much sunlight you're getting. Um, so depending on your um your latitude may determine how much vitamin D you need. Best thing to do is just check your vitamin D level and figure out if you need more.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
@jackspop11 Basic rule of thumb is 1000 IU per 25 lbs but if he gets a lot of sun may need lower dose. @jackspop11 Forgot to mention this rule maxes out at 5000 IU.
Vit. D depends on many factors. Generally 1000 IU/25 lbs. but if lot of sun maybe not.
2,000 IU/ day good if get sun.