Hi...I have UC and use Natural Factor's Protec....3 at bedtime.
I also use Primadophilus Reuteri every few days..I know many who use this one as well.
Others I know have started Enzymatica Pro-Bio probiotic and so far, so good. These ones don't require refrigeration, so that's a HUGE plus.
What I know for sure...rhamnosus is in all three (and reuteri is a substrain of it)...and if you do the research on the different kinds of probiotic strains..you can determine what your needs are and make a good decision accordingly.
Also, check out how many millions/billions of units are required for daily intake for maintaining proper gut flora...
The bottom (lol) line...it's trial and error, for what agrees with one, doesn't necessarily agree with another. I've tried different ones as well, and like the two I use best so far.
Let me know what you try.
It's all a matter of perspective!