Rising Tide of Vitamin D Deficiency among Middle-aged Population in Chennai, Tamil Nadu, India, Post-COVID: A Call for Public Health Action

Dear Editor, The Coronavirus Disease 2019 (COVID-19) pandemic has indelibly reshaped the landscape of global health, but one of its more insidious legacies has emerged quietly in its aftermath—an alarming rise in Vitamin D deficiency, especially among the middle-aged population (defined as individuals aged 40 to 65 years) in urban regions such as Chennai [1]. This growing nutritional concern has significant implications for public health, given the vital role Vitamin D plays in musculoskeletal integrity, immune regulation, and chronic disease prevention