Vitamin D (25-OH): normal range & what your result means

Q: How do I raise low vitamin D?

Sensible sun exposure, vitamin-D-rich foods, and supplements at the dose your doctor advises. Levels are usually rechecked after a course of treatment.

Q: What problems does vitamin D deficiency cause?

Tiredness, bone and muscle aches, and — if long-standing — softening of the bones and higher fracture risk. It is easily corrected once identified.

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 27 September 2026

Vitamin D supports bones, muscles and immunity. Deficiency is very common, especially with limited sun exposure.

Upload your report to MedDroid →

Typical adult reference range

Measure	Range
Deficient	< 20 ng/mL
Insufficient	20–29 ng/mL
Sufficient	30–100 ng/mL

What a HIGH result can mean

Very high vitamin D (usually from over-supplementing) can raise blood calcium and harm the kidneys

What a LOW result can mean

Low vitamin D can cause bone/muscle aches, tiredness and, over time, weak bones

Ranges vary by lab. Reference ranges are TYPICAL ADULT values and vary by laboratory, age, sex, pregnancy and the method used. Always read your result against the range printed on YOUR report, and let your doctor interpret it alongside your history.

Frequently asked questions

How do I raise low vitamin D?

Sensible sun exposure, vitamin-D-rich foods, and supplements at the dose your doctor advises. Levels are usually rechecked after a course of treatment.

What problems does vitamin D deficiency cause?

Tiredness, bone and muscle aches, and — if long-standing — softening of the bones and higher fracture risk. It is easily corrected once identified.

Upload your report to MedDroid →

Explore more

Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.