Vitamins & Minerals
Vitamin D (25-OH)
Vitamin D helps your body absorb calcium and phosphorus. It is produced by your skin in response to sunlight and absorbed from certain foods.
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Medically Reviewed by ILoveHealthcare Advisory Board
Information verified for medical accuracy
Why is it tested?
To check for bone disorders, monitor asthma, or investigate extreme fatigue and immune issues.
What does a HIGH level mean?
- Excessive vitamin D supplementation (Vitamin D toxicity)
- Kidney damage (rare)
What does a LOW level mean?
- Lack of sun exposure
- Inadequate diet
- Malabsorption issues (e.g., Celiac disease)
Normal Reference Range
20 to 50 ng/mL
*Ranges may vary slightly depending on the specific laboratory and testing methods used.
Related Biomarkers
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