Even transient probiotics provide benefits too. Even when killed by stomach acid they trigger certain beneficial pathways. Many, perhaps most, traditional diets

Even transient probiotics provide benefits too. Even when killed by stomach acid they trigger certain beneficial pathways. Many, perhaps most, traditional diets from around the world featured some live-culture fermented dish as a staple. Likely our bodies evolved to expect large daily exposure to certain healthy bacteria, and societies that ate live cultures with those bacteria would have better health.