Update: Florastor has removed the titanium dioxide, which they used to make the capsule white, so I'm upping my review from 1 star to 4. I'll definitely try it again.
Original review: This probiotic really has possibly helped a little, but the main reason for my review is my discovery that the capsules are colored with titanium dioxide -- a potentially toxic or harmful substance. Why they add this to the product, especially without disclosing it on the BOTTLE, is beyond me. Won't be buying again.