I have personally had the best experience with Align Probiotics, I have also had varying levels of success with Nature’s Way Primadophilus Junior as well as Digestive Advantage for Irritable Bowel Syndrome.

Some people have reported good results with Mutaflor or VSL #3, but these can be somewhat pricey.

You may also try getting probiotics from a non supplement source such as yogurt or probiotic fruit drinks. The two I’d recommend trying are GoodBelly Probiotic Juice & ZOI Greek Style Yogurt, if you have them in your local area.