Know Your Blood Parameter: Vitamin D (25-OH)

1. Parameter Name 

   Vitamin D (25-Hydroxyvitamin D)

   
   

2. Test Type 

   Blood

   
   

3. Normal Range 

   20–50 ng/mL

   
   

4. High Levels Indicate 

   Excessive supplementation may lead to toxicity, causing nausea, weakness, and kidney issues.

   
   

5. Low Levels Indicate 

   Deficiency; associated with bone pain, muscle weakness, increased risk of fractures.

   
   

6. Why It's Tested 

   To assess bone health, calcium absorption, and identify deficiency or toxicity.

   
   

7. Associated Symptoms (if abnormal) 

   Fatigue, bone pain, muscle weakness, mood changes.

   
   

8. What To Do If Abnormal 

   Adjust vitamin D intake through diet, supplements, or sunlight exposure as advised by a healthcare provider.

   
   

9. Common Conditions Related 

   Osteoporosis, rickets, osteomalacia.

   
   

10. Nutrition or Lifestyle Connection 

    Include vitamin D-rich foods like fatty fish, fortified dairy; ensure adequate sunlight exposure.

    
    

11. References (APA Format)

    • MedlinePlus. (2023). Vitamin D test. 

    • Cleveland Clinic. (2023). Vitamin D deficiency.