Understanding Lab Tests for Hypervitaminosis D
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Hypervitaminosis D is a condition caused by excessive vitamin D levels in the body, typically resulting from taking too much vitamin D supplementation. This condition can lead to serious health complications including hypercalcemia, kidney damage, and cardiovascular problems. Accurate diagnosis requires specific blood testing to measure vitamin D levels.
Recommended Test
Vitamin D
This blood test measures both vitamin D2 and D3 levels in the blood. Elevated levels indicate excess vitamin D intake leading to hypervitaminosis D. High vitamin D2 levels can cause symptoms like nausea, vomiting, weakness, and frequent urination, potentially progressing to bone pain and kidney stone formation. High vitamin D3 levels can lead to hypercalcemia and potentially damage the heart, blood vessels, and kidneys. This test is essential for confirming the diagnosis and monitoring treatment response.
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Diagnosing Hypervitaminosis D
Since symptoms of vitamin D toxicity can be non-specific and may include nausea, vomiting, weakness, frequent urination, and bone pain, a definitive diagnosis relies on blood testing that directly measures vitamin D levels. Early detection through testing is crucial to prevent progression to more severe complications affecting the kidneys, heart, and blood vessels.
Understanding the Results
Normal vitamin D levels typically range from 30-100 ng/mL, while levels above 150 ng/mL are generally considered toxic and indicate hypervitaminosis D. Your healthcare provider will interpret your results in the context of your symptoms and medical history to determine the appropriate treatment approach, which typically involves discontinuing vitamin D supplementation and monitoring recovery.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. If you suspect vitamin D toxicity, seek medical attention promptly as early intervention can prevent serious complications.
