Shocking Food Facts Ketchup was once used as medicine In 1834 tomatoes were added to ketchup, before this ketchup was comprised of mushrooms or fish. Tomatoes have vitamins and antioxidants that is claimed to help treat diarrhea, indigestion and jaundice. Prev20 of 22Next Share this:Click to share on Facebook (Opens in new window)Click to share on X (Opens in new window)