The prevalence of vitamin D deficiency among different population groups and its impact on health outcomes

Background: Vitamin D is an essential nutrient involved in various bodily functions such as bone health, immune system regulation, and cell growth. Despite its importance, vitamin D deficiency is a widespread issue globally, affecting individuals across different age groups and backgrounds. The deficiency's prevalence and impact on health outcomes vary among populations due to factors like sun exposure, dietary habits, skin pigmentation, and geographic location. This study reviews the recent advancements in understanding the prevalence of vitamin D deficiency among different population groups and its impact on health outcomes. Methods and Materials: A comprehensive literature review was conducted using databases such as PubMed, Google Scholar, and others from 2014 to 2024. Keywords like "Vitamin D," "Vitamin D Deficiency," and "evidence-based medicine" guided the search. The inclusion criteria focused on studies written in English and covered a wide range of research articles, clinical trials, and meta-analyses to ensure a thorough understanding of the topic. Results: The review revealed that vitamin D deficiency is prevalent across various demographic groups, with significant variations based on factors like skin pigmentation, age, geographic location, and lifestyle. Darker-skinned individuals, older adults, and those living in high-latitude regions are particularly at risk. The deficiency is linked to several adverse health outcomes, including osteoporosis, cardiovascular diseases, autoimmune disorders, and mood disorders like depression. Conclusion: Addressing vitamin D deficiency is crucial for improving public health. Tailored interventions considering demographic and geographic differences are necessary to mitigate the deficiency's impact. Public health strategies should promote sun exposure, dietary adjustments, and supplementation to enhance vitamin D levels, ultimately improving health outcomes and reducing healthcare disparities.