Written by: Anna Nicholson and Emily Downward | Last Reviewed: September 2019.
- Nutrition and IBD. Crohn's and Colitis Foundation of America. Available at http://www.crohnscolitisfoundation.org/resources/nutrition-and-ibd.html. Accessed 1/26/18.
- Vitamin B12. Mayo Clinic. Available at http://www.mayoclinic.org/drugs-supplements/vitamin-b12/background/hrb-20060243. Accessed 1/26/18.
- Vitamin B12. Oregon State University Micronutrient Information Center. Available at http://lpi.oregonstate.edu/mic/vitamins/vitamin-B12#deficiency-causes. Accessed 1/26/18.