Overview Clearance of 25-hydroxyvitamin D in Chronic Kidney Disease Status: Completed Trial end date: 2021-01-01 Target enrollment: Participant gender: Summary The goal of this study is to better understand vitamin D catabolism and how it is affected by CKD and race. Phase: Phase 1 Details Lead Sponsor: University of WashingtonCollaborator: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Treatments: CalcifediolErgocalciferolsHydroxycholecalciferolsVitamin DVitamins