Vitamin D: The Sunshine Deficiency in a Sunny City
13 July 2026 · 2 min read
Written by Lab24 Editorial Team
Medically reviewed by Dr Shahvar Fatima, MBBS, MD (Osmania Medical College, Hyd)
Last medically reviewed on 13 July 2026. This article is general health education, not a diagnosis or personal medical advice — please consult your doctor about your own results.
Here's a paradox we see every week: Hyderabad gets sunshine almost year-round, yet vitamin D deficiency is one of the most common results on our reports. Studies across Indian cities put deficiency rates well above 70%. If you spend your days indoors, the sun outside your window isn't reaching your skin.
Why "sunny" doesn't mean "sufficient"
Your skin makes vitamin D only when direct sunlight hits it — not through glass, not under sunscreen, and much less through darker skin, which needs longer exposure. Add air-conditioned offices, covering clothing, indoor jobs and the genuine heat that keeps people inside from 11 AM to 4 PM, and the result is a city full of people who are sunlit but vitamin-D-starved.
The symptoms are easy to miss
Deficiency rarely announces itself. It hides as:
- Tiredness that sleep doesn't fix
- Aching bones and muscles, especially the lower back and legs
- Frequent infections — vitamin D supports immunity
- Low mood, more noticeable in people who are always indoors
- Hair fall and slow-healing niggles
Because each of these has a dozen other explanations, the only way to know is to measure it.
The test
It's a single blood sample — 25-hydroxy vitamin D, the storage form that reflects your true level. No fasting, any time of day. Results are read as:
- Below 20 ng/mL — deficient
- 20–30 ng/mL — insufficient
- Above 30 ng/mL — sufficient
Who should check?
Almost any indoor adult is a fair candidate, but especially: office workers, older adults, women (particularly during pregnancy or menopause), anyone with persistent bone or muscle aches, and people already low who are on treatment and need a recheck after 3 months.
The reassuring part
Deficiency is simple and cheap to correct — usually a weekly supplement dose for a couple of months, then a maintenance plan, plus a bit more genuine sunlight on the arms in the early morning. Retesting after the course confirms you've actually topped up rather than guessing. Vitamin D is included in our Full Body Advanced package, or can be added to any booking with free home collection.
This article is for general information and is not a substitute for medical advice. Always discuss your results with your doctor.