Vitamin D type added for CYP24A1 vitamin D deficiency

This is a research registry for people who have a confirmed CYP24A1 genetic change tied to high calcium and kidney stone problems. It helps researchers better understand who is affected and may guide future studies or care approaches.

This trial compares two types of vitamin D—one is plain vitamin D2, the other is vitamin D2 plus a more active form (calcitriol)—to see which works better for children with liver problems and low vitamin D levels.

This trial studies whether giving a higher dose of vitamin D3 helps children and teens with inflammatory bowel disease (Crohn’s or ulcerative colitis) who have low vitamin D levels. Participants are already on biologic medicines and will be treated while monitoring blood (and safety) related to vitamin D.

This study tests if rifampin, a medicine usually used for infections, can lower high calcium levels in people with a rare genetic condition affecting vitamin D. It might help reduce symptoms like kidney stones or bone pain.

This trial tests a medicine called encaleret in children with a rare genetic condition that causes low calcium levels. The goal is to see if it safely helps control calcium and reduce symptoms.

This trial tests two forms of vitamin D (cholecalciferol and calcifediol) to see which better raises vitamin D levels in people with a deficiency. It may help you if your vitamin D is low, but you don't have osteoporosis or liver/kidney problems.