I think that Activa is using the same probiotic that is in Align, but in a significantly smaller amount. It is bifidobacterium infantis. This particular probiotic HAS been shown to help with IBS. Perhaps that's how Activia got the claim.
Probiotic Strain: Bifidobacterium infantis 35624 (Bifantis) is the patented probiotic ingredient in Align that can help build and maintain a healthy digestive system.*
Proof: Bifantis has been the subject of several clinical studies and has been featured in peer-reviewed journals. Please see Bifantis.com for full details.
Packaging: Align contains 1 x 109 (1 billion) CFUs of live bacteria when manufactured, and provides an effective level until the "best by" date on the package. Align capsules come in specially designed blister packs that ensure bacteria remain alive and effective until the date on the box.
Quality and Quantity: DNA testing guarantees the purity of Align. The packaging and labeling meet all World Health Organization (WHO) recommendations by clearly stating:
Strain: Bifidobacterium infantis 35624 (Bifantis)
Colony-forming units (CFU): 1 x 109 (1 billion) live bacteria when manufactured, and provides an effect level of bacteria until at least the “best by” date.
Suggested serving size: One capsule daily
Health benefits: Helps promote a healthy digestive system*
Proper storage conditions: Store at room temperature; no refrigeration required.
Corporate contact information: AlignGI.com or (800) 208-0112
I have taken this probiotic (Align) since April 2010 after I had an episode of C Diff Colitis which landed me in the hospital. I can tell you that is has been an absolute life saver. I never relapsed from C Diff in over two years and my IBS symptoms resolved within days. It IS expensive, but it works. I have just started subbing it with the BJs brand probiotic. I am going to try theres for a month and see.
A lot of common GI complaints - bloating, gas, constipation, and diarrhea are from a GI tract that does not have the proper antibacterial balance.