Actually you CAN take too much probiotics. Having too much good bacteria, and not enough bad can have a negative effect on your immune system, since it needs a healthy balance of good and bad bacteria. I'd say no more than a minimum of 40 billion a day.
The best probiotic I've tried is called Orthobiotic.
It contains 7 strains, along with the strain saccharomyces boulardi (very important for lyme healing) with 20 billion CFU. It also has been scientifically formulated for room temperature storage, so no refridgeration is needed. You can get at most health stores for around $30 for 30 capsules.
Post Edited (Katie18) : 3/10/2012 9:08:38 PM (GMT-7)