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Interpret Your Vitamin D (25-OH) Results

Enter your 25(OH)D value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.

Medical Disclaimer

This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.

Always consult a qualified healthcare professional before making any health decisions. Read full disclaimer →

Supported: Blood tests, urine tests, thyroid, lipid panel, liver function, kidney function, HbA1c, and other numerical lab results. Not supported: ECG, ECHO, ETT, CT scans, MRI, X-rays, PET scans, histopathology, and other diagnostic imaging reports. 🚀 Coming Soon

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Vitamin D (25-OH) Normal Ranges

25-hydroxy Vitamin D (calcidiol) is the storage form of vitamin D and the best test to measure overall vitamin D status.

Reference Range	Unit	Notes
30 – 100	ng/mL	Sufficient
20 – 29	ng/mL	Insufficient

Also reported in: nmol/L.Conversion factor: 1 nmol/L = 2.500 ng/mL.

Critical (Panic) Values

Critical Low: < 10 ng/mL. Critical High: > 150 ng/mL. Values outside these limits require immediate clinical attention.

Common Causes of High 25(OH)D

Vitamin D toxicity from excessive supplementation (most common)Granulomatous diseases (sarcoidosis, TB, histoplasmosis — produce active vitamin D)Williams syndrome (genetic hypersensitivity)

Common Causes of Low 25(OH)D

Insufficient sun exposure (indoor lifestyle, dark skin, living at high latitudes)Dietary deficiency (vegans, low dairy intake)Malabsorption syndromes (celiac disease, Crohn's disease, gastric bypass)

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Reference ranges, causes, symptoms, preparation, and FAQs.

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