Quick answer
Vitamin D deficiency is diagnosed with the 25-hydroxy vitamin D blood test. Below 20 ng/mL is deficient, 20–29 ng/mL is insufficient and 30–100 ng/mL is sufficient. Common symptoms are body aches, bone pain, fatigue and muscle weakness. No fasting is required.
Why is vitamin D deficiency so common in India?
Even in a sunny country, most people spend their days indoors, cover most of their skin, and travel during low-sun hours. Darker skin also makes less vitamin D from the same amount of sunlight, and few Indian foods are naturally rich in it.
Symptoms of vitamin D deficiency
- Body aches and bone pain
- Lower back pain
- Muscle weakness and cramps
- Fatigue and low mood
- Frequent infections
- Hair fall
Vitamin D levels explained
| 25-OH Vitamin D level | Status |
|---|---|
| Below 20 ng/mL | Deficient |
| 20–29 ng/mL | Insufficient |
| 30–100 ng/mL | Sufficient |
| Above 100 ng/mL | Possible toxicity |
Who should get tested?
- Anyone with persistent body pain or fatigue
- Women after menopause and adults above 50
- People with little sun exposure
- People with kidney or liver disease
- Anyone taking vitamin D supplements (to check the dose)
Frequently asked questions
Should calcium be tested with vitamin D?
Yes. Vitamin D controls calcium absorption, so testing both gives a better picture of bone health.
How long does it take to correct vitamin D deficiency?
Usually 2–3 months of treatment as prescribed by a doctor. Retest after about 3 months.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.