1. Less Sun Exposure
Vitamin D is made in the skin when exposed to sunlight. Staying indoors, using too much sunscreen, or living in polluted areas reduces Vitamin D production.
2. Darker Skin Tone
People with darker skin have more melanin, which reduces the skin’s ability to produce Vitamin D from sunlight.
3. Aging
As age increases, the skin’s capacity to produce Vitamin D decreases, leading to deficiency in older adults.
4. Obesity
Excess body fat traps Vitamin D, making it less available in the bloodstream.
5. Poor Diet
Very few foods naturally contain Vitamin D. Not eating fortified foods, dairy, fatty fish, or eggs can reduce intake.
6. Digestive Disorders
Problems like celiac disease, Crohn’s disease, or IBS reduce the body’s ability to absorb Vitamin D from food.
7. Kidney or Liver Problems
These organs help convert Vitamin D into its active form. Any disorder reduces the conversion process.
8. Medications
Certain medicines (anti-seizure drugs, steroids, cholesterol-lowering drugs) interfere with Vitamin D absorption or metabolism.
