I do some research with Digestives Enzymes and found this:
Why Most Probiotics Donít Work
While probiotics are essential for optimal health, capturing their benefits from most conventionally available products can pose a technical challenge. The reason is that many of the living organisms these products are supposed to contain donít even survive the high heat and pressure common to the manufacturing process. All too often, the remaining live cells die quickly while sitting on the shelf; or they cannot survive exposure to stomach acid or bile in the gut so that they may go on to colonize the colon.
An advanced probiotic formulation containing strains of the bacterium Bacillus coagulans offers promise in sidestepping the difficulties and maximizing the benefits of probiotic supplementation. These microorganisms are each surrounded by a natural protective shield, which helps them survive the heat and pressure of manufacturing and the acids and bile of digestion, so they have a far better chance of arriving alive and well in the intestines, where they go to work.11,12 This provides Bacillus coagulans with a significant therapeutic advantage over conventional probiotics. Bacillus coagulans is unique compared with traditional probiotics for three important reasons: survivability, colonization, and lactic acid production.
i read this from LEF