Vitamin d deficiency in children
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Prevalence and Risk Factors for Vitamin D Deficiency in Children
Vitamin D deficiency is highly prevalent among children and adolescents worldwide, with studies reporting rates ranging from 10% to over 40% in various populations Fischer2023Huh2008Andıran2012+2 MORE. The risk of deficiency increases with age, and adolescent girls are particularly vulnerable Andıran2012Durá-Travé2019Karagol2023. Other risk factors include limited sun exposure, darker skin pigmentation, urban residence, higher body mass index, and living in regions with less sunlight, especially during winter and spring Durá-Travé2019Özmen2024Karagol2023. Social deprivation and nonwhite ethnicity are also associated with higher rates of deficiency .
Health Consequences of Vitamin D Deficiency in Children
Vitamin D is essential for bone health, and its deficiency can lead to serious conditions such as rickets, bone deformities, and hypocalcemia in infants and children Fischer2023Huh2008Ashraf2014+1 MORE. Beyond bone health, there is growing evidence that vitamin D deficiency may contribute to the development of chronic diseases, including autoimmune disorders, cardiovascular diseases, and possibly cancer Huh2008Ashraf2014. Most children with biochemical deficiency do not show specific symptoms, making the condition easy to overlook .
Diagnosis and Assessment of Vitamin D Status
Vitamin D status is typically assessed by measuring serum 25-hydroxyvitamin D (25OHD) levels Alonso2019Fischer2023. However, there is some controversy regarding the exact threshold for deficiency and sufficiency in children, and the relationship between 25OHD and parathyroid hormone (PTH) is not always clear in pediatric populations . Most guidelines consider levels below 20 ng/mL as deficient, but some studies use different cutoffs Alonso2019Andıran2012Karagol2023.
Trends in Diagnosis and Awareness
There has been a significant increase in the diagnosis and testing for vitamin D deficiency in children over the past decade, reflecting greater awareness among healthcare providers . However, despite this increased attention, vitamin D deficiency remains common, even in countries with ample sunlight .
Prevention and Treatment Strategies
Prevention of vitamin D deficiency relies on adequate sun exposure, food fortification, and dietary supplementation Fischer2023Misra2008Karagol2023. Prophylactic supplementation is especially important for high-risk groups, such as adolescent girls and children living in areas with limited sunlight Andıran2012Karagol2023. Treatment involves oral or injectable vitamin D, but recommendations for dosing and duration can vary . There is a need for further research to clarify the long-term effects of deficiency and the benefits of supplementation in asymptomatic children .
Conclusion
Vitamin D deficiency is a widespread and persistent problem among children and adolescents, with significant health implications. Risk factors include age, sex, limited sun exposure, and certain sociodemographic characteristics. Prevention through supplementation and sunlight exposure is crucial, especially for high-risk groups. Continued research and public health efforts are needed to address this ongoing issue and to optimize screening and treatment strategies for children.
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