In a randomized controlled trial, the probiotic Bifidobacterium animalis subsp. lactis—used in many probiotic products, including Dannon’s Activia yogurts—did nothing to improve bowel health in people with constipation, according to data from a randomized triple-blind placebo-controlled clinical trial Wednesday in JAMA Network Open.
https://www.google.com/search?client=firefox-b-d&q=does+stomach+acid+kill+all+bacteria
i mean it certain kills a lot but might not something useful be left over? how would we test for that