Saves the questions and what to expect into your notes, next to the visit they belong to.
Keep this study
Lead
Legacy Health System
Age
18–99
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
≥ 18 years of age
Willing to stop herbal medications as directed by physician
Willing to stop current supplemental Vitamin D (Multivitamin with Vitamin D component is acceptable)
Willing to travel to Legacy Health/OHSU facility if necessary
Agree to attend study visits outside of standard of care visits, if necessary
Diagnosed with stage III colon or stage II/III rectal cancer that will receive neoadjuvant or adjuvant chemotherapy but have not yet started
Baseline serum Vitamin D level below 52 ng/ml
You may not be if
≤ 18 years of age
Colon cancer stages I-II and IV or Rectal cancer stage I or IV
Patients who do not undergo chemotherapy
Patients with prior chemotherapy for this cancer
No other prior malignancy except for adequately treated basal cell or squamous cell skin cancer, in situ cancer, or other cancer for which the patient has been disease-free for \> 3 years
Unable to comply with protocol
Unable to provide written informed consent
Unwilling or unable to stop oral supplemental Vitamin D
Patients taking high-dose Vitamin D supplementation (50,000 IU weekly) prior to enrollment
Patients with Vitamin D levels above 52 ng/ml at baseline testing
Patients with hypercalcemia and/or any condition resulting in malabsorption
Investigator does not believe study participation, for any reason, is in the best interest of the patient
