Take in fall/winter&: Whether you have a thyroid or not, everyone in the us (except deep south) gets deficient in vit d in fall & winter unless you take it. In spring & summer you can get d from being in midday sun without sunscreen- if this is not the case take it year-round. Adults need about 5000 iu/day for optimal levels. As to why, vit d improves health & reduces mortality, decrease cancer &...See comment for more:.
Answered 5/9/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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