Zachs said:I think people keep hearing sterile gut and thinking our intestines are make from stainless steel and we just need to wipe it clean.
Having a sterile gut is impossible and we would most likely die quickly without any gut bacteria. The main points are to keep the bacteria from traveling up the gut where they cause trouble with normal digestion and to keep them in check and not let them proliferate out of control.
We won't die quickly with a sterile gut. It has been achieved multiple times in humans as a side effect of prolonged antibiotic therapy. What it does do is it may allow bad bacteria to colonize the clean gut and that may be lethal. So a clean gut is not a problem, it's the potential to be colonized with pathogenic bacteria. However, if there is a practical way to keep your gut clean, it is preferable. In other words, in the absense of practical methods or resources to keep your gut always clean then it is the lesser of two evils to have it colonized by "beneficial" bacteria as opposed to something like the Clostridium strain. But it is not preferable to having a clean gut.