The vagus nerve transmits signals from the gastrointestinal tract to the brain, influencing appetite and overeating.

“the vagus nerve is this large nerve that goes all the way to your brain it has branches everywhere the diaphragm the stomach the intestines and so it is sort of this this tendril this tentacle coming down from the brain into our body to survey what's going on in our stomach and in our sort of gastrointestinal the peritoneal cavity and when you introduce Foods in there that that have a precursor effect and become these molecules like 2ag you can stimulate the vagus nerve to send signals to the brain lo and behold you overeat”