Just FYI from the FAQ section on the biokplus.com website:
How is Bio-K+ superior ?
Bio-K+ is a major advancement in Lb. acidophilus technology and functional foods. It represents a giant leap from dormant freeze dried powders to super-potent live culture. It is already active and does not require reactivation in the body. This is a great benefit as powered products need reactivation and it is not known how much can or will be reactivated. Bio-K+ is a highly concentrated unique blend of a special strain of Lb. acidophilus (CL1285) and Lb. casei. It contains a minimum of 50 billion live cells per serving of 100 grams. This makes it not only the BEST choice for best results but also a very economical one.
Why does Bio-K+ contain only 2 different strains of bacteria?
Research shows that when too many different bacteria are combined, they can compete against each other and limit the concentration of the most effective strains. The natural synergy between Lb. acidophilus & Lb. casei is partcularly effective against pathogenic micro-organisms.