It's pretty obvious when your tomatoes have turned, but how can you tell if your ketchup's gone bad? Take a tour of the refrigerator to find out just how long your mustard and mayo can stay on the shelf.
MEDICAL REVIEW: Reviewed by Cynthia Haines, MD, August 2005.
SOURCE DOCUMENTATION: United States Department of Agriculture. The J.M. Smucker Co. * Nestle USA. Karen P. Penner, Ph.D. "Cupboard Approximate Storage Times," Kansas State University, March 1990.
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Last Editorial Review: 10/20/2005