Evidence of gut/brain connection piles up

The gut is teeming with bacteria, good and bad, and these organisms and their cousins living elsewhere on and in the body outnumber the body’s own cells by an order of magnitude.  It is only recently that the notion has come to the fore that these microorganisms are doing something other than helping us digest food or aiding in keeping nefarious colonies at bay.  Now researchers are beginning to realize that there is a feedback loop at work between the brain and the gut, with one influencing the other.