Limited Sun Exposure: Not spending enough time outdoors, especially during peak sunlight hours, can lead to Vitamin D deficiency.

Sunscreen Use: While sunscreen is crucial for skin protection, it can also block UVB rays necessary for Vitamin D synthesis.

Geographical Location: Living in regions with limited sunlight, especially during winter months, can reduce Vitamin D production.

Skin Pigmentation: People with darker skin require more sun exposure to produce the same amount of Vitamin D as those with lighter skin.

Aging: As we age, our skin's ability to synthesize Vitamin D decreases, making older adults more susceptible to deficiency.

Gastrointestinal Disorders: Conditions like celiac disease, Crohn's disease, and inflammatory bowel disease can impair Vitamin D absorption.

Medications: Certain medications, including corticosteroids, anticonvulsants, and weight loss drugs, can interfere with Vitamin D metabolism.