1 Clinical Trials for Various Conditions
This study is being conducted to determine if vitamin D supplementation increases the level of a protein that may be involved in decreasing the risk of esophageal cancer in patients with Barrett's esophagus. Subjects with Barrett's esophagus will take vitamin D supplementation for 2-12 weeks depending on the severity of their condition, and receive an upper endoscopy procedure before and after vitamin D supplementation trial.