I posted this in another thread.
Hey I tried that - Oral 'Butyrate complex' by Pharmax
[calcium,magnesium,butyric acid calcium-magnesium butyrate]
and their website said "do not take if you have ulcerative colitis"
"Contra-indications
Not suitable for individuals with colitis, gastritis or ulcerative conditions of the stomach or colon.
www.healingedge.net/store/product1840.html