Hi, I have had IBS for quite a few years and i have worked hard to exclude foods that cause irriatation to my bowel. My problem is that exercise, namely running causes my body to stress and my bowel wants to empty during the run. I like running. could this be helped by Iron and vitamin B's. My last blood test showed that i was lacking in vitamin b12 and enimic. I purchased liquid iron and b12 and was on a cause for a bout 6 weeks.Is it possible that i may need to continue with these for ever?