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Vitamin D Deficiency
Vitamin D deficiency is very common, even in sunny countries, and can cause bone and muscle aches and weakness. Vitamin D is vital for strong bones and calcium balance.
Causes & risk factors
- Limited sun exposure (indoor lifestyle, covering skin, sunscreen)
- Darker skin, which makes vitamin D more slowly
- Low dietary intake
- Older age and obesity
- Some gut and kidney conditions
Common symptoms
- Tiredness
- Bone and joint aches
- Muscle weakness or cramps
- Back pain
- Frequent illness in some
- Often no symptoms at all
Tests & diagnosis
- Vitamin D (25-OH)
- Calcium
- Phosphate
- Parathyroid hormone (PTH) if needed
Treatment & management
- Sensible sun exposure
- Vitamin D-rich or fortified foods (eggs, fatty fish, fortified milk)
- Vitamin D supplements as advised
- Adequate calcium intake alongside
- Rechecking levels after a course of treatment
When to see a doctor urgently
- Persistent bone pain or muscle weakness
- Bone pain with a history of fractures
- Symptoms with limited sun exposure
- A very low vitamin D level on testing
Frequently asked questions
How much sunlight do I need for vitamin D?
Short, regular sun exposure to the arms and face (about 15 to 30 minutes, a few times a week) helps, though the amount varies with skin tone and location. Supplements are often needed too.
Can I get enough vitamin D from food?
It is difficult, as few foods are naturally rich in it. Fatty fish, eggs and fortified foods help, but many people need supplements to correct a deficiency.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
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.