After a nasty bout with c.diff and having to take heavy duty antibiotics for several weeks to kill EVERYTHING in my GI tract, I wanted only the best probiotics to repopulate my digestive system. Since taking Florastor twice daily for 1.5 months, everything is back to the way it should be! I'm no longer in pain or having digestive difficulty. I'm able to eat foods I haven't been able to eat in years with my terrible Crohn's Disease. It's worth the moderately spendy price tag to make sure my body is in proper working order, and I'm very pleased with this purchase.