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Biotech / Medical : Biotech News
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To: tom pope who wrote (6681)11/3/2009 2:42:08 PM
From: Ian@SI  Read Replies (3) of 7143
 
Tom,

The Vitamin D, 25-Hydroxy at $59.99 is the measurement that I see most often cited in Research abstracts. Anything below 30ng/ml or 75 nmol/l would be viewed as insufficient or deficient by most researchers. Top end of the "normal" range is about 300 nmol/l.

I think that the highest natural level is about 60-70ng/ml (150-175nmol/l). But I've only seen this number once and don't have a high level of confidence in its accuracy.

While Biotech Jim's response is far more definitive, getting a single test is probably an appropriate starting point, at least until you find out whether or not there's an issue.

FWIW,
Ian
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