Varies: Routinely i recommend 2000 iu's / day people treating osteopenia and osteoporosis should take higher doses usually about 50, 000 iu's per week vitamin d3 is the best one.
Answered 12/9/2013
5.5k views
Measure serum level: First, then supplement accordingly.
Answered 10/28/2013
5.5k views
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A doctor has provided 1 answer
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