D3 has a short half life. It gets used up pretty quickly.
People also vary in their storage of it, some need more to keep a higher blood level than others. I also tested at 43 when using 5,000 IU daily.
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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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