CALCITRIOL [1,25(OH)D], the active form of VITAMIN D, DOES NOT provide a satisfactory indication of a person's VITAMIN D status - Its best evaluation and the "gold-standard"is obtained from the circulating CALCIDIOL [25(OH)D] level.
-Recommended Testing Lab - Lab Corp in the US; if the test is done by Quest Diagnostics Lab, then divide your result by 1.3 to get the "real"number.
-Ng/ml vs. nmol/l -ng/ml are the units of measure in the U.S., however, much of the world uses nmol/l. Test results measured in nmol/l, are multiplied by 2.5 to get ng/ml.
Normal vs. Optimal CALCIDIOL Levels - The "normal" 25(OH)Dlab range is between 20-56 ng/ml. This conventional range is really a sign of deficiency, and is too broad to be ideal. Dark-skinned, tropical agricultural workers typically have blood levels of ~ 60 ng/mL.
The OPTIMAL value of 25 (OH) D for EVERYONE (children, adolescents, adults and seniors) is 50-65 ng/ml.
-Your VITAMIN D level should never be below 32 ng/ml;
-A level below 20 ng/ml is considered seriously deficient - increasing your risk of as many as 16 different cancers, including breast and prostate cancer, and also auto-immune diseases, such as rheumatoid arthritis and MS.
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25 (OH) D CALCIDIOL LEVELS |
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Deficient |
Optimal |
With Cancer |
Too High |
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<50 ng/ml |
50-65 ng/ml |
65-90 ng/ml |
>100 ng/ml |
