Vitamin D is one of the most essential nutrients for the human body. It supports strong bones, boosts immunity, improves muscle function, and even contributes to mental well-being. When levels fall too low, children may develop rickets, and adults can experience bone pain, fatigue, and mood-related issues.
Today, Vitamin D deficiency is extremely common—especially in cities—despite supplements and sunlight exposure. Experts explain the hidden reasons behind persistent low Vitamin D levels.
Why vitamin D deficiency occurs
Dr. Rohit Sharma, Consultant, Internal Medicine (Apollo Spectra Hospital), explains several common causes:
-
Insufficient sunlight exposure
Most people work indoors from morning to afternoon, when sunlight is strongest. Because Vitamin D is synthesized in the skin through UVB rays, lack of outdoor time leads to deficiency. -
Low intake of Vitamin D-rich foods
Diet plays an important role. Many people consume insufficient amounts of:
• Eggs
• Milk and dairy products
• Cheese
• Fish
• Fortified foods -
Obesity
Excess body fat traps Vitamin D and reduces its availability in the bloodstream. -
Certain medications
Some medicines interfere with Vitamin D absorption or metabolism. -
Liver or kidney conditions
These organs convert Vitamin D into its active form. If their function is reduced, Vitamin D levels drop. -
Age-related absorption issues
As we grow older, the intestines absorb Vitamin D less efficiently. -
Lifestyle habits
• Sunscreen used excessively
• Always staying in AC rooms
• Pollution reducing UVB penetration
How to correct Vitamin D deficiency
Dr. Sharma suggests a combination of diet, sunlight, and medical guidance:
• Balanced diet: Include eggs, milk, yogurt, cheese, fish, and fortified foods.
• Sunlight exposure: Sit in mild morning sunlight (between 9–11 a.m.) for 10–20 minutes, allowing sunlight to fall directly on arms, legs, and face.
• Supplements: Vitamin D capsules or sachets can be taken only after consulting a doctor.
• Maintain healthy weight: Reducing excess fat improves Vitamin D availability.
Signs of low Vitamin D
Persistent deficiency can lead to:
• Fatigue and low energy
• Muscle pain or weakness
• Bone aches, joint pain
• Increased risk of fractures
• Slow healing
• Mood changes such as sadness or depression
• Poor immunity
Why timely diagnosis matters
If left untreated, Vitamin D deficiency can worsen over time and cause severe bone issues, muscle weakness, and mental health challenges. Regular check-ups and Vitamin D tests are important if symptoms persist.
