Maybe you should say it would not help many. I don't know about activa so much but Align does not have all that bacteria and you don't refrigerate it but it works great for me. Stopped my diarrhea (which I had had for months) in about 3 weeks - gradually but saw a difference in a few days! It is advertised as a "different" type of probiotic... The difference with me is that it does not give me gas as every other kind of tried did - especially added fiber and Philips!
" Bifantis is the natural probiotic ingredient in Align. The specific and pure strain of Bifantis found in Align is Bifidobacterium infantis 35624, which helps build and maintain healthy gastrointestinal flora.* Align is the only probiotic supplement that contains Bifantis." From their website.
Probably works so good for us who only have mild to moderate UC and IBS!