%0 Journal Article %A Kuznia, Sabine %A Czock, David %A Kopp-Schneider, Annette %A Caspari, Reiner %A Fischer, Harald %A Laetsch, Dana Clarissa %A Slavic, Marija %A Brenner, Hermann %A Schöttker, Ben %T Efficacy and Safety of a Personalized Vitamin D3 Loading Dose Followed by Daily 2000 IU in Colorectal Cancer Patients with Vitamin D Insufficiency: Interim Analysis of a Randomized Controlled Trial. %J Nutrients %V 14 %N 21 %@ 2072-6643 %C Basel %I MDPI %M DKFZ-2022-02739 %P 4546 %D 2022 %Z #EA:C070#LA:C070#LA:C120# %X A personalized vitamin D3 loading dose has not yet been tested in cancer patients. This interim analysis of the randomized, placebo-controlled VICTORIA trial analyzed the first recruited 74 German adults with nonmetastatic colorectal cancer, a tumor surgery within the past year, and 25-hydroxyvitamin D levels (25(OH)D) < 50 nmol/L. Study participants received a loading dose tailored for a baseline 25(OH)D level and BMI in the first 11 days, followed by a maintenance dose of 2000 IU of vitamin D3 daily until end of trial week 12. The mean 25(OH)D levels were 27.6, 31.0, and 34.1 nmol/L in the placebo group and 25.9, 63.1, and 75.5 nmol/L in the verum group during screening, visit 1 (end of loading dose), and visit 2 (end of maintenance dose), respectively. The prevalence of 25(OH)D) ≥ 50 nmol/L at visits 1 and 2 was 3.5 %K bolus (Other) %K calcium (Other) %K colorectal cancer (Other) %K efficacy (Other) %K loading dose (Other) %K personalized medicine (Other) %K randomized controlled trial (Other) %K safety (Other) %K treatment regimen (Other) %K vitamin D (Other) %F PUB:(DE-HGF)16 %9 Journal Article %$ pmid:36364809 %R 10.3390/nu14214546 %U https://inrepo02.dkfz.de/record/182558