Oh - Lactobacillus acidophilis is an excellent probiotic for generally bowel health. And it along with some other probiotics have some efficacy treating and preventing things like traveler's D.
It definitely cannot hurt to take acidophilis and it might help with general colon health. However, the clinical evidence to date suggests it is not a particularly effective probiotic like Align and some others for managing IBS symptoms.
I hope that helps.
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS