Based on this evidence, the committee concluded that the bone-strengthening benefits of vitamin D plateau when blood levels (as measured by a standard vitamin D blood test) reach 12 to 16

Reference ranges for 1,25 (OH) 2 D may be reported as either pg/mL or pmol/L. The molecular weight of 1,25 (OH) 2 D is approximately 416.7, yielding the following conversion factors: 1
The consensus is that levels of 25(OH)D below 25nmol/L indicate 'deficiency'. Some have argued that this level is conservative. Raising the definition of "deficiency" or "sufficiency" to higher levels is inappropriate until results from randomised trials can show that maintaining such levels has clear health benefits and no health risks.
Poziom 25(OH)D3 poniżej 30 µg/ml (w niektórych laboratoriach
Normal Results. The normal range of 25-hydroxy vitamin D is measured as nanograms per milliliter (ng/mL). Many experts recommend a level between 20 and 40 ng/mL. Others recommend a level between 30 and 50 ng/mL. The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. The normal range of 25-hydroxy vitamin D is measured as nanograms per milliliter (ng/mL). Many experts recommend a level between 20 and 40 ng/mL. Others recommend a level between 30 and 50 ng/mL. The examples above are common measurements for results of these tests. 5Ibw. 52 9 488 245 206 265 420 487 47

vitamin d 25 oh d3 normal range