@ETpro : Sorry that I forgot to mention all the reputable scientific research directed at chicken soup, made only, however, with free-range Jewish chicken, organic onions, carrots, celery and turnips (and preferably with a little mezzuzah nailed to the door of the coop).
I thought that it was part of the common law and that the palliative qualities were accepted by all.
Mt grandma understood the uses of a placebo. She told my then 7-year-old brother that if he buried a piece of raw bacon in the back yard under a full moon, the warts on his hand would disappear. They did. The adults and I, (the older sister) knew it was granny magic.