1. Skeletal and Extraskeletal Actions of Vitamin D: Current Evidence and Outstanding Questions. Bouillon R, Marcocci C, Carmeliet G, et al. Endocrine Reviews. 2019;40(4):1109-1151. doi:10.1210/er.2018-00126. 2. The Health Effects of Vitamin D Supplementation: Evidence From Human Studies. Bouillon R, Manousaki D, Rosen C, et al. Nature Reviews. Endocrinology. 2022;18(2):96-110. doi:10.1038/s41574-021-00593-z. 3. Vitamin D, Respiratory Infections, and Chronic Disease: Review of Meta-Analyses and Randomized Clinical Trials. Ganmaa D, Enkhmaa D, Nasantogtokh E, et al. Journal of Internal Medicine. 2022;291(2):141-164. doi:10.1111/joim.13399. 4. Vitamin D and Multiple Health Outcomes: An Umbrella Review of Observational Studies, Randomized Controlled Trials, and Mendelian Randomization Studies. Liu D, Meng X, Tian Q, et al. Advances in Nutrition (Bethesda, Md.). 2022;13(4):1044-1062. doi:10.1093/advances/nmab142. 5. Non-Skeletal Health Effects of Vitamin D Supplementation: A Systematic Review on Findings From Meta-Analyses Summarizing Trial Data. Rejnmark L, Bislev LS, Cashman KD, et al. PloS One. 2017;12(7):e0180512. doi:10.1371/journal.pone.0180512. 6. Health Effects of Vitamin D Supplementation: Lessons Learned From Randomized Controlled Trials and Mendelian Randomization Studies. Bouillon R, LeBoff MS, Neale RE. Journal of Bone and Mineral Research : The Official Journal of the American Society for Bone and Mineral Research. 2023;38(10):1391-1403. doi:10.1002/jbmr.4888. 7. Targeted 25-Hydroxyvitamin D Concentration Measurements and Vitamin D Supplementation Can Have Important Patient and Public Health Benefits. Grant WB, Al Anouti F, Moukayed M. European Journal of Clinical Nutrition. 2020;74(3):366-376. doi:10.1038/s41430-020-0564-0. 8. Vitamin D Effects on Musculoskeletal Health, Immunity, Autoimmunity, Cardiovascular Disease, Cancer, Fertility, Pregnancy, Dementia and Mortality-a Review of Recent Evidence. Pludowski P, Holick MF, Pilz S, et al. Autoimmunity Reviews. 2013;12(10):976-89. doi:10.1016/j.autrev.2013.02.004. 9. Non-Musculoskeletal Benefits of Vitamin D. Wimalawansa SJ. The Journal of Steroid Biochemistry and Molecular Biology. 2018;175:60-81. doi:10.1016/j.jsbmb.2016.09.016. 10. Physiology of Vitamin D-Focusing on Disease Prevention. Wimalawansa SJ. Nutrients. 2024;16(11):1666. doi:10.3390/nu16111666. 11. Vitamin D: Evidence-Based Health Benefits and Recommendations for Population Guidelines. Grant WB, Wimalawansa SJ, Pludowski P, Cheng RZ. Nutrients. 2025;17(2):277. doi:10.3390/nu17020277. 12. Screening for Vitamin D Deficiency in Adults: US Preventive Services Task Force Recommendation Statement. US Preventive Services Task Force, Krist AH, Davidson KW, et al. JAMA logoJAMA. 2021;325(14):1436-1442. doi:10.1001/jama.2021.3069.