Quick answer: Vitamin D deficiency is common even in sunny countries. It can cause tiredness, bone and muscle aches and weak bones. It is confirmed by a simple blood test (25-hydroxy vitamin D) and treated with supplements at a dose your doctor chooses, plus sensible sun exposure and diet.
In this article
Vitamin D helps your body absorb calcium and keep bones and muscles strong. Many people in Pakistan are low in vitamin D, even though the country has plenty of sunshine. This is because of indoor work, clothing that covers most of the skin, darker skin tone, air pollution and few vitamin D-rich foods.
Symptoms of vitamin D deficiency
Many people have no symptoms, which is why deficiency is often missed. When symptoms occur they can include:
- Constant tiredness
- Bone pain, especially in the back, hips or legs
- Muscle weakness or aches
- Frequent falls in older adults
- Cramps or tingling in the hands and feet
- In children, delayed walking, bowed legs or soft bones (rickets)
These symptoms are not specific to vitamin D. Thyroid problems, anaemia and diabetes can feel similar, which is why testing matters.
Who is at higher risk?
- People who spend most of the day indoors
- Women who cover most of their skin outdoors
- People with darker skin
- Older adults
- People who are overweight, since vitamin D can be held in body fat
- People with kidney, liver or bowel disease
- Pregnant and breastfeeding women
How is it tested?
The test is a blood test called 25-hydroxy vitamin D. As a general guide:
| Result (ng/mL) | What it usually means |
|---|---|
| Below 20 | Deficient |
| 20 to 29 | Low or insufficient (interpretation varies between guidelines) |
| 30 to 100 | Adequate |
| Above 100 | Possibly too high |
Some laboratories report in nmol/L instead. Your doctor will interpret your result with your symptoms, bone health and kidney function.
Treatment
Treatment is simple but should be guided by a doctor.
- Supplements: vitamin D3 is usually given in a higher dose for several weeks, followed by a lower daily maintenance dose. The right dose depends on how low your level is.
- Sunlight: short, regular sun exposure helps, but it is rarely enough on its own and should be balanced against skin protection.
- Food: oily fish, eggs, and fortified milk or cereals contribute a little.
- Calcium: make sure your overall intake of calcium is adequate, from dairy, leafy greens and other sources.
- Recheck: a repeat test after about three months shows whether the dose is working.
More is not better. Very high doses taken for a long time can cause too much calcium in the blood, leading to nausea, constipation, kidney stones and kidney damage. Always follow your doctor's dose.
When to see an endocrinologist
See a specialist if your level stays low despite treatment, you have bone pain or fractures, you have high calcium, thyroid or parathyroid problems, or you have kidney disease. An endocrinologist can also check for osteoporosis.
Frequently asked questions
What is a normal vitamin D level?
Most guidelines consider a level of 30 ng/mL (75 nmol/L) or more as adequate, and below 20 ng/mL (50 nmol/L) as deficient. Levels in between are interpreted by your doctor.
Can I take vitamin D without a test?
It is better to test first and take a dose chosen for you. Very high doses over a long time can be harmful.
Does vitamin D deficiency cause hair loss or weight gain?
Evidence is limited. Hair loss and weight gain have many causes, including thyroid disease, iron deficiency and hormonal conditions, so it is worth checking those too.
How long does it take to correct vitamin D deficiency?
Levels usually improve in about two to three months with treatment, and then a maintenance dose may be needed.
Book a consultation with Dr. Junaid Iqbal
Evening clinic Monday to Saturday, 5:00–9:00 PM at City Clinic, Muzaffargarh.
WhatsApp Call +92 313 7667979This article is for general information only and is not a substitute for personal medical advice, diagnosis or treatment. Always speak to a qualified doctor about your own health.