I alternate between 2:
In the morning I take - Ultimate Flora "Advanced Immunity" (in the refrigerated section)
(this was recommended by several digestive disease books, and I think it has helped me a lot)
After dinner I take - kyo dophilus (not refrigerated) (recommended by a health professional)
Since each Probiotic's daily dose is 2, I thought I would split dosage between a vegetable based (ultimate flora), and a human based (kyo dophilus).
I also take fish oil and aloe every morning, which I consider to help keep me intestinally well balanced... I take many other anti inflamitory and vitamin supplements throughout the rest of the day too. Seems to work great for me so far... Have not had a flare since I started taking these supplements. Over 5 weeks now.