Batubara, I.F. and Sonia, S. 2026. The Effect of Vitamin D in Reducing C-reactive Protein Levels in Ulcerative Colitis: Evidence-based Case Report: Evidence-based Case Report. Cermin Dunia Kedokteran. 53, 06 (Jun. 2026), 388–394. DOI:https://doi.org/10.55175/cdk.v53i06.2033.