There is so much yet to come from studying the microbiome and its influence over "us" (the brain part, that is). For a good overview of how much there is still

There is so much yet to come from studying the microbiome and its influence over "us" (the brain part, that is). For a good overview of how much there is still to uncover, see the 2012 New Yorker article "Germs Are Us": http://www.newyorker.com/magazine/2012/10/22/germs-are-us http://www.newyorker.com/magazine/2012/10/22/germs-are-us For a lighter-still take on the gut-brain connection, Radiolab had a segment a couple of years ago on the vagus nerve (mentioned as a possible culprit in the linked article/study): http://www.radiolab.org/story/197242-gut-feelings/ http://www.radiolab.org/story/197242-gut-feelings/ Emily Deans routinely blogs about the gut-brain connection: http://www.psychologytoday.com/blog/evolutionary-psychiatry/201406/human-microbiota-and-depression http://www.psychologytoday.com/blog/evolutionary-psychiatry/...