This is probably really dumb, but I've been having digestive trouble and have heard loads of good things about the effectiveness of probiotics.

The trouble is, I don't know what constitutes as a probiotic.

Does the supplement say "Probiotic" right there on the bottle?? Or is there a particular supplement that is naturally probiotic and I only need to find it?

I did search the local shops and a GNC, and the best I could come up with was Acidophilis - will this be enough to help? Any information or comments on the effectiveness of probiotics would be appreciated. Thanks!