Vitamin D Deficiency in Pakistan

Abstract

Vitamin D deficiency is a significant public health issue in Pakistan, affecting nearly 70–90% of the adult population despite adequate sunlight availability. This poster emphasizes the essential physiological functions of vitamin D in maintaining bone mineralization, calcium homeostasis, muscle strength, immune regulation, and cellular growth. Vitamin D is synthesized in the skin through ultraviolet-B (UV-B) radiation and subsequently activated in the liver and kidneys to perform its biological functions. Epidemiological evidence indicates a higher prevalence of deficiency among women, elderly individuals, children, dark-skinned populations, and indoor workers, with females being disproportionately affected. Contributing factors include limited sun exposure, sedentary indoor lifestyles, inadequate dietary intake, darker skin pigmentation, and chronic medical conditions such as malabsorption syndromes, liver disease, and kidney disorders. Clinical manifestations range from skeletal complications including rickets, osteomalacia, and osteoporosis to muscle weakness, recurrent infections, fatigue, depression, and cognitive disturbances. Diagnosis is primarily based on serum 25-hydroxyvitamin D levels, which classify deficiency, insufficiency, sufficiency, and toxicity. Management strategies highlighted in the poster include regular sunlight exposure, intake of vitamin D–rich foods, supplementation with vitamin D3, and routine monitoring through laboratory testing. The poster also addresses common misconceptions and promotes evidence-based awareness regarding vitamin D deficiency. Early identification, preventive interventions, and public health education are crucial to reducing the burden and long-term complications associated with vitamin D deficiency in Pakistan.