General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.
The 25-hydroxyvitamin D test, also known as the blood test for vitamin D, measures the amount of vitamin D in the blood. Vitamin D is crucial for bone health, immune function, and overall health. A low level of vitamin D can lead to rickets in children and osteomalacia in adults, causing weak bones and muscle pain. The test is recommended for people at risk of vitamin D deficiency, including those with chronic kidney disease, those on certain medications, and those with limited sun exposure. It's important to consult a healthcare provider to understand the results and discuss any concerns.
⚠️ Reference ranges vary by lab, age and sex — always use the range printed on your own report.
Consult a doctor to interpret results — a single test does not make a diagnosis.
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