AUTHOR=Madkhali Yahya , Janakiraman Balamurugan , Alsubaie Faisal , Albalawi Olayan , Alrashidy Saleh , Alturki Mohamad , Ahmed Mehrunnisha , Manzar Md Dilshad , Kashoo Faizan TITLE=Prevalence and trends of vitamin D deficiency in a Saudi Arabian population: a five-years retrospective study from 2017 to 2021 JOURNAL=Frontiers in Public Health VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1535980 DOI=10.3389/fpubh.2025.1535980 ISSN=2296-2565