The mega mega like 600,000IU doses are still very controversial, but we had one poster here a while back who could not absorb things orally and did have some IV supplements done.
The D you get on RX is D2 and not really very active.
In short, the rule being offered by the experts is 1000 IU of D3 for every 10ng you want to raise from your test results.
more here:
http://www.vitamindcouncil.org/
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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