Clinical Trial of the Viability of LAB and Bifidobacteria From Acidophilus Pearls in Human Stool Samples

Commercial probiotics can be delivered in numerous forms. The two most common delivery forms are similar to the two product formats to be tested. It has been demonstrated using in vitro testing that probiotic organisms that are unprotected from gastric exposure may not survive that exposure and therefore may not remain viable throughout the rest of the GIT. (Unpublished studies conducted at SNA research facility, February, 2010.) Similar in vitro testing of Acidophilus Pearls has demonstrated the probiotic organisms in an enteric capsule will survive gastric exposure. It is anticipated that this difference in in vitro gastric survivability will translate to improved digestive tract survivability that can be demonstrated using fecal recovery techniques.

The commercial product to be tested in this clinical trial has been in the market for over 17 years. However, it is not known what effect this commercial product has on the commensal probiotic population in the gut and particularly in the lower bowel where much of probiotic benefits are believed to be largely realized. Also, it is not known what effect the commercial product has on the total commensal microbiota or fecal pH. While commercial probiotic products have been largely aimed at benefits related to improved health, they also have the potential to change overall gut microbiota (probiotics as well as all others) composition and activities. Learning what happens to the overall gut microbiota can be a helpful step in establishing the potential health benefits of the probiotic class of organisms in the test products.