Peter Attia· MD
the gastrointestinal tract which for obvious reasons is a very relevant aspect of the system originally was I think regarded pretty much the way that adipose tissue was is a tube that absorbed your calories and didn't really participate actively in the regulation of that aspect of biology clearly the advent of various surgeries for control of body weight have indicated that that sort of premise is incorrect that is that there are very powerful influences of the gastrointestinal tract which are brought out by some of the surgeries that are done and it's now very clear that the gastrointestinal tract at many levels is communicating with the brain both byproducts that it secretes and by direct neural input