Vitamin D test: levels, deficiency and what to do
Medically reviewed by Dr. N. S. Santosh Varma, MBBS, FIM, FIDM, FICCM · Reg. APMC/FMR 112686 · Reviewed October 2026
The vitamin D test measures 25-hydroxy vitamin D in the blood. Commonly used levels are: below 20 ng/mL is deficient, 20 to 29 ng/mL is insufficient, and 30 ng/mL or above is usually considered sufficient. Low vitamin D is common in India despite sunshine. Supplements should be taken only at the dose a doctor advises.
Vitamin D levels
| 25(OH) vitamin D | Commonly used category |
|---|---|
| Below 20 ng/mL | Deficient |
| 20 – 29 ng/mL | Insufficient |
| 30 ng/mL and above | Sufficient |
Some labs report in nmol/L. Very high levels, usually from too many supplements, can also be harmful.
Why it matters
- Helps the body absorb calcium for bones and teeth
- Low levels are linked to bone pain, muscle weakness and fatigue
- Long-term deficiency can contribute to weak bones (osteomalacia or osteoporosis)
Who may need it
- People who spend most of the day indoors
- Older adults and post-menopausal women
- People with bone pain, frequent fractures or muscle weakness
- People with conditions affecting absorption, or on certain long-term medicines
Is it included in YIRA's checkup?
This test is not part of YIRA's 70-test checkup. The doctor consultation included in every YIRA Family Health Plan can advise whether you need it, based on your results and history.
A YIRA Family Health Plan includes a 70-test full body checkup at home for one registered member, a doctor consultation for the family, a review of an elder's past reports, and dental and eye check-ups. Essential ₹999 a year (up to 4 family members registered); Complete ₹1,299 a year (up to 8, with ₹5 lakh accident cover for the buyer).
70-test checkup at home plus family care, from ₹999 a year
Essential ₹999 (one 70-test checkup, up to 4 family members registered) · Complete ₹1,299 (up to 8, with ₹5 lakh accident cover). Doctor consultation, dental and eye check-ups included. Pay after sample collection.
Frequently asked questions
Is fasting needed for a vitamin D test?
Usually not. Follow your lab's instructions if it is combined with other tests.
Why is vitamin D deficiency common in India?
Indoor lifestyles, covered clothing, pollution and darker skin, which needs more sunlight to make vitamin D, all contribute.
Should I take vitamin D supplements without testing?
It is better to test first and take the dose your doctor advises. Too much vitamin D can be harmful.
Related
Medically reviewed by Dr. N. S. Santosh Varma (MBBS, FIM, FIDM, FICCM; APMC/FMR 112686). Prepared by the YIRA health team · Last updated 1 October 2026. This page is general health information, not medical advice or a diagnosis. Reference ranges differ between labs; always discuss your results with a doctor. In an emergency, call 108 or go to the nearest hospital.