If you’re a regular Mark’s Daily Apple reader, you probably have at least a generally accurate if somewhat vague notion of the important functions performed by our gut bacteria. They’re a “big part” of our immune systems. They “improve digestion” and “eat the fibers and resistant starches” that our host enzymes cannot digest. Yeah, gut bacteria are hot right now. Everyone’s talking about them. And, since our host cells are famously outnumbered by our gut bacteria, 10 to 1, we need to be apprised of all that they do.
We don’t know everything yet – and we probably never will – but here are some of the most interesting and unexpected functions of our gut bacteria: