a. why do they need to? your gut flora derives value from variety, not always certain strains. b. that's just specific to brand, storage, distribution, etc. I

a. why do they need to? your gut flora derives value from variety, not always certain strains. b. that's just specific to brand, storage, distribution, etc. I can name plenty of dairy brands that are incredibly effective cultures kefir is one (yes i know its not yogurt) c. false. you dont need high concentrations you just need a "landing zone" for the good bacteria, and there are plenty of methods of clearing a landing zone and making space for the good bacteria.