In my own attempts to balance my intestinal flora, I used acidophilus for several months. It's a good product, however, when I discussed this with my N.D., he suggested that since i was trying to achive balance, I may want to try a probiotioc formula that is comprised of several friendly bacteria, including acidophilus and salivarius (which is found in collostrum), actually 11 bacteria in total. This appealed to my common sense, since I know there are a great many friendly bacteria in raw milk. I've been using the recommended "multi" for about two years now. Super results ! Very inexpensive too. Thought this may be a benefit for you to know since you seem to be after balance.