Vitamin D Deficiency: Symptoms, Causes, and Testing
By Dr. Priya Sharma
Learn about vitamin D deficiency symptoms, risk factors, and how to get tested. Essential reading for Indians with limited sun exposure.
Vitamin D deficiency is remarkably common in India, affecting an estimated 70–90% of the population. Despite abundant sunshine, factors like indoor lifestyles, pollution, dark skin pigmentation, and cultural clothing practices limit vitamin D synthesis.
What Does Vitamin D Do?
Vitamin D is essential for:
- Bone health — calcium absorption and bone mineralization
- Immune function — reducing risk of infections and autoimmune conditions
- Muscle strength — preventing weakness and falls in older adults
- Mood regulation — linked to seasonal affective disorder and depression
Symptoms of Deficiency
Many people have no obvious symptoms. When present, signs may include:
- Fatigue and general weakness
- Bone pain and muscle aches
- Frequent illness or slow wound healing
- Hair loss
- Depression or low mood
Who Is at Risk?
- People with limited sun exposure (office workers, elderly, homebound)
- Individuals with dark skin pigmentation
- Those with malabsorption conditions (Crohn's, celiac disease)
- Obese individuals (vitamin D is sequestered in fat tissue)
- Breastfed infants (without supplementation)
- Strict vegetarians/vegans with limited dietary vitamin D
Normal Vitamin D Levels
| Level (25-OH Vitamin D) | Status | |------------------------|--------| | < 20 ng/mL | Deficient | | 20 – 29 ng/mL | Insufficient | | 30 – 100 ng/mL | Sufficient | | > 100 ng/mL | Potentially toxic |
Getting Tested
A simple blood test measuring 25-hydroxy vitamin D (25-OH Vitamin D) confirms your status. Your doctor will recommend supplementation based on your level and clinical needs.
Prevention Tips
- Get 15–20 minutes of midday sun exposure on arms and legs when possible
- Eat vitamin D-rich foods: fatty fish, egg yolks, fortified milk
- Consider supplementation as advised by your physician
Related Health Screening
Vitamin D testing is often combined with a full body checkup or CBC test for comprehensive health assessment. Contact Red Bio Path Labs in Patna to book your test.