Clinical Research Directory

Inclusion Criteria: 1. Adults Aged 18-85 2. Diagnosis of IBD (Ulcerative Colitis or Crohn's Disease) within the patient's records based on standard clinical, endoscopic, and radiologic criteria. 3. Patients within outpatient gastroenterology clinics at Victoria Hospital and St. Joseph's Hospital with follow-up appointments within the next 2 years (ongoing IBD care). 4. Participants must have the ability to read, comprehend, and voluntarily provide informed consent without assistance. Exclusion Criteria: 1. Those who do not meet the inclusion criteria. 2. Those with any concurrent diagnosis of disease that may affect calcium or Vitamin D metabolism (i.e., rheumatoid arthritis or other inflammatory joint disease, thyroid disease, parathyroid disease, primary bone disease, granulomatous disease, sarcoidosis, lymphoma). 3. Those with either renal dysfunction (serum creatinine \>0.150 mmol/L) or receiving dialysis were excluded, patients with chronic liver disease, and hypercalcemia (\>2.65mmol/L). 4. Those using oral corticosteroids for the management of any disease other than IBD. 5. Those with a history of Vitamin D or calcium supplementation within 6 months prior to the trial. 6. Those who were seen once by the gastroenterology team but never followed up (no ongoing IBD care).