What vitamin deficiency is considered a worldwide epidemic?

• A. Vitamin A deficiency
• B. Vitamin C deficiency
• C. Vitamin D deficiency
• D. Vitamin B12 deficiency

Answer: (C)

Vitamin D deficiency is considered a worldwide epidemic because it affects people across many regions, ages, and socioeconomic groups. Skin synthesis from sun exposure is the major source, but modern lifestyles reduce sun exposure, and even when sun is available, factors like latitude, season, sunscreen use, aging skin, and higher body fat can lower circulating vitamin D. Dietary sources are limited, so overall intake often falls short, leading to widespread deficiency. This combination creates a global public health concern affecting bone health and potentially immune function, which is why it’s described as an epidemic worldwide.