Gut friendly microorganisms, typically bacteria
, but also some yeast
. Can be found in fermented foods such as tempeh (not tofu), yogurt, kefir, sauerkraut, kimchee, miso, sourdough bread. These can be dietary staples. Can also be found in kombucha. Can also be found in otc products (more regulated).
Interact with "prebiotics"-the fibers that the "probiotics" live on.