The heated argument about ketchup storage continues since Heinz reintroduced this long-standing question: should ketchup go in the refrigerator or remain on kitchen shelves? The controversy ...

First things first, ketchup may be a sauce but not all sauces are ketchups. Ketchup is cold and is never heated as a rule. Sauces, on the other hand, are used in cooking and generally served hot.