According to the book, Probiotics by Casey Adam Ph.D., there are more than 100 benefits to supplementing with probiotics. Hundreds of studies have shown different species of probiotics confer different health benefits.
However, we must take these probiotics in their proper context. For example, almost every probiotic study requires the patient to take large, therapeutic doses, for at least two months. Often times, the studies conferred the benefits after an entire year of daily, large dose supplementation.