Over the years, I've run into too many people who disagree on this. I've always been told to put it in the fridge, but several people have told me that is weird. I'd like to see what Hubbers say about this... =)
Putting the Ketchup and Mustard in the refrigerator down here in SC! They probably both have enough preservatives to make them okay in the pantry, though! My mom doesn't put either in the fridge, and I think hers taste "yucky." Seems like outside of the fridge, the top layer gets kind of brown and crusty, too! Better safe than sorry is my motto.
You can help the HubPages community highlight top quality content by ranking this answer up or down.