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Vitamin D3 (1,25-OH D3),Serum

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Vitamin D3 (1,25-OH D3),Serum

Accredited Facility E-report Qualified Specialists

This test is done to measure the active form of vitamin D (calcitriol), which plays a key role in calcium and phosphate regulation, bone health, and immune function. Abnormal levels may be seen in kidney disease, parathyroid disorders, or granulomatous diseases such as sarcoidosis. It is not the same as 25-OH vitamin D, which reflects vitamin D stores.

  • If calcium or phosphate imbalance is suspected.
  • If kidney disease is present or being evaluated.
  • If parathyroid hormone disorders are suspected.
  • If a healthcare provider is assessing unusual vitamin D metabolism.
  • Fasting: Not required.
  • No special preparation is usually needed.
  • Inform your healthcare provider about vitamin D or calcium supplements.
  • Follow any instructions provided by the laboratory or healthcare provider.
    • Vitamin D3 (1,25-OH D3),Serum
    No labs currently offering this test.