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Krug's team divided the vitamin D levels they found into four groups: normal (defined in the study as above 32 nanograms per deciliter), mild deficiency, moderate deficiency, or severe.
Low Vitamin D levels in Northern American Adults with the Metabolic Syndrome
They reported results in ng/ml, nanograms per milliliter. A milliliter is one thousandth of a liter. A deciliter is one tenth of a liter. Something is amiss two orders of magnitude! What? I don't know. Maybe it depends on the method in the particular assay used.
Find out the particular units used in lab results. The reference range for 25-hydroxyvitamin D in SI units is 34.9 - 105 nanomoles per liter or 14 - 42 nanograms per milliliter in conventional units in the winter with a plasma specimen according to Harrison's Principles of Internal Medicine, 15th Edition, page A-7, Copyright 2001.
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