If it works for Peter Rabbit for overimbibing on lettuce then it has to work for us on fast food.  Mommas from rabbits to humans have depended on chamomile for many digestive disorders.   The plants are known
as Matricaria recutita L. or German/Hungarian chamomile.  The other is Anthemis nobilis L. or Roman / English chamomile.  I guess the different country names evolved due to the locals finding the similar uses of their "native" plants and all claim credit theirs are the best for ailment A, or B, or C.   However both of them are members fo the Asteraceae or daisy family. 

           The working components of the oils of these plants are the azulenes, blue-colored volatile oil,  and they have been studied over and over by many around the world.  The German variety is used throughout Europe as a general cure all but finds most use as a digestive aid or as an anti-inflammatory.  The oils are used in ointments, lotions, vapor baths, inhalants and of course as Mamma Rabbit used, as a tea.   A word of caution is needed that for those who have allergies to ragweed, asters, chrysanthemums may find the oil to also be an irritant if used topically or in some situations as a tea.  However remember that in Germany they have a phrase for chamomile, alles zutraut, or "capable of anything".

           To give credit where credit is due one of the very best books on the use of herbs medicinally is "The Honest Herbal" by Varro E. Tyler, Ph.D., Professor Emeritus of Purdue University School of Pharmacy.  Dr. Tyler continues to travel the world educating on the constituent properties of herbs and their oils.  I always refer to his book prior to writing any of the medicinal properties of the herbs we present to you.

                                                                                                                                                                                                                                                                      German Chamomile, most used medicinally and most researched.