Just an idea: Ulcerative Colitis and IBS are triggered by stress. Vitamin B12 (all of the B's are good for stress reduction) is necessary to produce red blood cells.All of the B's are good for stress reduction. It is water soluble, so anything your body doesn't need, it removes in the urine.
Another issue that is not discussed is the Vitamin D and Calcium deficiency caused by malabsorption in the gut (diahrrea). Vitamin D and Calcium are essential for bone formation and for preventing colorectal cancer.
"It is now well established that vitamin D is an important regulator of the immune system which may have implications for the development, severity and management of immune related disorders such as IBD."
http://www.ncbi.nlm.nih.gov/pubmed/22493989
Moist heat is an excellent way to increase circulation in inflammed joints, so is pure peppermint oil. Peppermint cools the joint and reduces inflammation.