A vitamin D level of 74 ng/mL
| Where it fallsthe Endocrine Society bands | Sufficient |
|---|---|
| Vitamin D (25-OH) | 74ng/mL |
| Usual reference range | 30 – 100 by the Endocrine Society, 20 and above by the Institute of Medicineng/mL |
| Same result in nmol/L | 185nmol/L |
| Severely deficient | under 12ng/mL |
| Deficient | 12 – 19ng/mL |
| Insufficient | 20 – 29ng/mL |
| Sufficientthis reading | 30 – 99ng/mL |
| Above the usual range | 100 and aboveng/mL |
Notes
- One reading is not a diagnosis. Vitamin D (25-OH) moves with sun exposure, season, skin tone, body weight and supplement dose over the preceding weeks. A clinician reads it against your history and usually against a repeat, not on its own.
- Reference ranges differ between laboratories. The bands above follow the Endocrine Society bands. Your own report prints the range its analyser was calibrated against, and that printed range is the one to compare against — a difference of a few units between labs is normal and does not mean either is wrong.
- Two respected bodies draw the line in different places, and both are on your lab report's shelf. The Endocrine Society treats under 30 ng/mL as insufficient; the Institute of Medicine concluded 20 ng/mL is enough for bone health in most people. A result of 74 ng/mL can therefore be labelled "insufficient" by one guideline and "adequate" by the other without either being wrong — they were answering different questions, one about optimal treatment targets and one about population requirements.
- The test measures 25-hydroxyvitamin D, not the active hormone, because the storage form reflects supply over the preceding weeks while the active form is held steady by the body until deficiency is severe. Testing the active 1,25 form when the question is "am I short of vitamin D" is a known ordering error and gives a misleading answer.
What vitamin d level of 74 ng/mL means
A reading of 74 ng/mL falls in Sufficient by the Endocrine Society bands.
The usual reference range is 30 – 100 by the Endocrine Society, 20 and above by the Institute of Medicine ng/mL.
Reading it next to the rest of the picture
A single figure is a snapshot. What a clinician does with it is set by what sits around it — the other results on the same report, what the person is being treated for, what they were doing in the hours before the sample, and what the previous result was. Two people can hand over the same number and leave with different advice, and neither has been given the wrong answer.
That is also why the bands on this page are drawn from a named guideline rather than from a rounded rule of thumb. A threshold is a decision point somebody argued for in print, not a law of nature, and knowing which document a line comes from is what lets you tell a meaningful result from a borderline one.
Nearby sizes
Read more
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