Colony Forming Units (CFU) is a marketing metric for probiotics representing the number of colonies that grow on a petri dish.

“and moreover it only gives you a uh one piece of data about what's in that pill so when you do that the only thing you get to see are what's able to form a colony but actually in almost every supplement every probiotic out there the majority of what's in that pill is dead probiotic and you don't see any of that when you use this technology”

“so Colony forming units again little remember back to seventh grade biology where you might have been given a petri dish and you had to like swab your mouth or swab your hand or put your finger on it and then you see what grows that's that's basically that that tool so you take your um you know your pill or or whatever your yogurt and you you basically spread it out on a petri dish and then you count how many colonies form and that gives you a number so you'll say well gee this pill has you know 10 to the 9th Colony forming units in it”