While I agree that probiotics can help quite a bit, you still have to keep tabs on you diet, or you will never know if someting is helping, or just muting some of the negative feects of trying to eat normally. I was in denial for my first couple of years of UC, and I tried my hardest to maintain a regular diet so that no one would know about my "terrible secret". It wasn't until I truly put effort into modifying my diet, low residual foods, less fat, low carbs, eating smaller meals thorugh out the day, that helped me to figure out the probiotics really did help, but they required me to help them.
I've also noticed that when switching probiotics, it usually takes anywhere from a couple of days to a cople of weeks before my intestinal flora adjust to the new bacteria being introduced. You intestines are an enclosed environment, and aren't used to much change. It is kind of like the TV show Survivior. When you introduce something new, it takes a little while for all the bacteria to meet each other, become friends, and decide if the new strains are better than the some of the older strains. And if an older strain is voted out of the gut, it puts up some resistance. You have to give it time, and take it easy during the crossover.
As the old show Kung Fu said "Patience grasshopper. All will become clear when you are ready." I think I've been watching way too much TV lately. If I start quoting CSI, someone please pull the plug. lol
36 y.o. male
Diagnosed w/ moderate UC in May '06
Asacol, Florastor, VSL#3, Wellbutrin XL, Prozac, multi-vitamin, Allegra, Lialda, Colocort enema, Prednisone (trying to taper down)