Bibliometric Analysis of Vitamin D Research 2019-2024

Vitamin D research is an important area of biomedical research. This study is a bibliometric analysis that investigated trends in vitamin D research since 2019. A bibliometric analysis was conducted using the SCOPUS database for data extraction. A total of 10,449 articles (2019-2024) were analyzed using the Biblioshiny package in RStudio. Articles were included if they contained "Vitamin D" in titles, abstracts, and keywords. The highest scientific production on vitamin D was observed in the USA (5,354), followed by China (4,842), which showed a steep increase in research output over time. Both had more single-country than multi-country publications, with international co-authorship at 21.02% of publications. Between the peak in 2021 (1,895 articles) and the low in 2024 (1,584 articles), vitamin D research output declined by 16.52%; citation rates also decreased. The Nutrients journal saw a steep increase in publications starting in 2021. The most cited study was identified, and its content was reviewed. Prevalent research topics included epidemiology, drug therapy, and prevention and control. Despite early momentum, vitamin D research output and citations have declined in recent years, indicating a decreasing interest in the field. The imbalance between single- and multi-country authorship suggests an opportunity for greater global collaboration. Future work may benefit from interdisciplinary partnerships across institutions.