\section{Methods}
Observe the behavior of some individuals with GERD as well as give them some foods or expose them to some smells and observe the results.
Interaction between the nervous regulation and hormonal regulation due to synchronization with external stimuli (smells of  different wave patterns during periods of the day-night) and through the physiology of appetite and behavior changes.
Catha edulis [20], Teucrium polium [21].