how is gut flora research pseudo-science?
A) they don't identify which bacteria is in the Yogurt. B) Lab testing has shown that yogurt is a terrible medium for supporting probiotics so most or all of them are dead by the time you eat it. C) Probiotics in foods don't typically establish themselves in your gut, it already is saturated with bacteria ideally suited to the environment. You would need frequent and high concentrations to disrupt that.