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About the test
What is this test done for?
To measure the levels of Vitamin D in the blood.
Why is it Done?

It is done –

  • While assessing vitamin D deficiency
  • To supply a protective effect against multiple diseases as diabetes mellitus, cancer & more.
When should it be performed?

It is performed when patients have following symptoms:

  • When the patient is obese i.e. BMI above 30 units.
  • When sun is shunned i.e. sunscreens inhibit Vitamin D production.(SPF 15)
  • Patients who adhere to strict vegan diet
  • Patients with symptoms of bone pain, muscle weakness, fibromyalgia, Osteoporosis & osteoarthritis.
  • Adults when kidney function is not proper i.e. Diabetes mellitus & hyper tension.
  • Severe asthma in children.
  • Patient with dark skin, the pigment melanin reduces the ability to make  Vitamin D from the sun.
  • Patients with PCOS, Migraine, Depression, Epilepsy.
  • To monitor treatment with vitamin D3 supplementation
  • In patients with parathyroid disorders
How is it done
A blood sample will be collected from a vein in your arm. Fasting is not required prior to sample collection.
  • Normal values : 20-50- ng/ ml.
  • Above 100 ng/ ml - High range
  • 50-70 ng/ ml - Optimal range
  • 20- 30 ng/ ml - Low range
  • below 20 ng/ ml - Severe deficiency
  • Patients with results below 30 have a deficiency and need to take vitamin D supplements.
Other Tests
  • Serum calcium should also be done as often the levels are low in cases of vitamin D deficiencies.
  • Parathyroid hormone test should be done to help detect cause for excess vitamin D, as its levels might be high.
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