1228. Vitamin D (25-hydroxyvitamin D, 25-(OH)D)
Description
25-hydroxyvitamin D is the main metabolite of vitamin D in human blood. Its measurement allows for monitoring overall vitamin D levels in the body and plays a key role in diagnosing conditions associated with significantly increased or decreased vitamin D levels.
It is recommended to assess 25(OH)D together with parathyroid hormone (PTH) and calcium.
When and who needs the test?
- Diagnosis of vitamin D deficiency and calcium metabolism disorders.
- Diagnosis and monitoring of postmenopausal osteoporosis, rickets, osteomalacia, renal osteodystrophy, during pregnancy, neonatal hypocalcemia, and hypoparathyroidism.
- Diagnosis of vitamin D deficiency and calcium metabolism disorders associated with rickets, pregnancy, nutritional and malabsorption disorders.
- Differential diagnosis of hypercalcemia and hypocalcemia.
Biological material
- Venous blood
Preparing for a blood test
In order to exclude factors that may affect the test results, we recommend to follow the preparation rules:
- an important condition for laboratory tests is to take blood on an empty stomach.
- 6-12 hours before the test, you should avoid eating, drinking alcohol, smoking, and limit physical activity. Drinking...
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