Risky or Not?

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A square image shows an opened glass jar of mayonnaise sitting on a wooden pantry shelf. The mayo appears discolored and crusty around the rim, suggesting spoilage. The dim lighting and aged wood add to the sense of neglect and food safety concern.

787. Mayonnaise From a Recently Opened Jar Kept in a Cabinet Less Than a Week

June 20, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from a jar of mayonnaise that was opened and then accidentally left at room temperature for less than a week

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Microbiological Safety of Mayonnaise, Salad Dressings, and Sauces Produced in the United States: A Review - ScienceDirect
  • Review: Fate of pathogens in home-made mayonnaise and related products - ScienceDirect
  • An Assessment of Escherichia coli O157:H7 Contamination Risks in Commercial Mayonnaise from Pasteurized Eggs and Environmental Sources, and Behavior in Low-pH Dressings - ScienceDirect
  • A Review of Temperature, pH, and Other Factors that Influence the Survival of Salmonella in Mayonnaise and Other Raw Egg Products
  • Models for the Inactivation of Foodborne Pathogens in Salad Dressing from Challenge Studies - ScienceDirect
  • Mayonnaise - an overview | ScienceDirect Topics
  • Independent Writer, Speaker, and Broadcaster - Merlin Mann


June 20, 2025 /Don Schaffner
Mayonnaise, Time temperature control for safety food
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