Vitamin D (25-OH) (25(OH)D)
The storage form of vitamin D. Produced in skin from sunlight and obtained from food. Critical for bone health, immunity, and mood.
Typical normal range
30–100 (sufficient) · 20–29 (insufficient) ng/mL
If high ↑
Toxicity (> 150): hypercalcemia, nausea, kidney stones
If low ↓
Deficiency (< 20): bone pain, fatigue, muscle weakness, immune dysfunction, depression
What is a normal Vitamin D (25-OH) level?
A typical reference range is 30–100 (sufficient) · 20–29 (insufficient) ng/mL. Ranges vary between laboratories and can depend on age and sex, so compare your result with the range printed on your own report.
What does a high Vitamin D (25-OH) level mean?
Toxicity (> 150): hypercalcemia, nausea, kidney stones. A single result rarely gives a diagnosis on its own; your doctor will interpret it alongside your symptoms and other tests.
What does a low Vitamin D (25-OH) level mean?
Deficiency (< 20): bone pain, fatigue, muscle weakness, immune dysfunction, depression. Your doctor will interpret it alongside your symptoms and other tests.
About the Vitamins & Minerals
Vitamin and mineral tests look for deficiencies that can cause tiredness, anemia, weak bones or nerve problems. Many are easy to correct once found.
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Medical disclaimer: Reference ranges vary by laboratory, age, sex, and clinical context. This page is for educational purposes only and is not a diagnosis. Always discuss your results with a qualified healthcare professional.