While certain things such as blood in your poop and frequent diarrhea are known red flags, it turns out that whether your ...

The active ingredient in Pepto Bismol, bismuth subsalicylate, may not help with prevention of diarrhea while traveling, a study found.

Traveler's diarrhea can also be caused by parasites, like giardia, which has the highest rate of triggering PI-IBS. But giardia doesn't release the toxin, meaning something else is probably at play.