The Ultimate Guide to Mayo Expiration Dates

The Ultimate Guide to Mayo Expiration Dates

Updated June 10, 2025
CanIEatExpired.com Team
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The Ultimate Guide to Mayo Expiration Dates

Mayonnaise is a popular condiment that can be found in many households. Whether you use it to make sandwiches, salads, or as a base for dips, it's important to ensure that your mayo is safe to eat. One key aspect of mayo safety is understanding its expiration dates. In this comprehensive guide, we will delve into everything you need to know about mayo expiration dates, including how to store mayo properly, how to interpret expiration dates, and when to safely consume mayo past its expiration date.

Understanding Mayo Expiration Dates

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Mayonnaise typically comes with a "best by" or "use by" date on the packaging. It's important to understand the difference between these dates:

Best By Date

  • The "best by" date indicates the date until which the mayo is expected to be at its peak quality in terms of flavor and texture.
  • Consuming mayo after the best by date does not necessarily mean it is unsafe, but the quality may deteriorate.

Use By Date

  • The "use by" date is a more stringent guideline, indicating the date until which the mayo is expected to be safe to consume.
  • Consuming mayo after the use by date can pose a risk of foodborne illness if not stored properly.

Proper Storage of Mayo

To ensure the longevity and safety of your mayo, proper storage is key. Here are some tips on how to store mayo correctly:

Refrigeration

  • Once opened, mayo should be stored in the refrigerator at all times.
  • Keep mayo in its original airtight container or transfer it to a clean, sealed container.
  • Store mayo away from the door of the refrigerator to maintain a consistent temperature.

Avoid Contamination

  • Always use clean utensils when scooping out mayo to prevent cross-contamination.
  • Do not double-dip utensils back into the mayo after they have touched food.

Check for Spoilage

  • Inspect the mayo for any signs of spoilage, such as an off smell, unusual color, or mold growth.
  • If the mayo appears or smells off, discard it immediately.

Safety Tips for Consuming Mayo

While mayo can be consumed past its expiration date under certain conditions, it's essential to take precautions to ensure your safety:

Smell Test

  • Before consuming mayo past its expiration date, give it a sniff. If it smells rancid or off, discard it.
  • Mayo should have a neutral, slightly tangy smell when fresh.

Visual Inspection

  • Check the consistency and color of the mayo. If it appears watery, discolored, or has any signs of mold, do not consume it.

Taste Test

  • If the mayo passes the smell and visual tests, you can do a small taste test.
  • If the taste is off or unpleasant, it's best to err on the side of caution and discard the mayo.

Conclusion

In conclusion, understanding mayo expiration dates is essential for maintaining food safety. By following proper storage practices, regularly checking for spoilage, and using your senses to assess the quality of mayo, you can enjoy this delicious condiment safely. Remember, when in doubt, it's best to discard mayo that is past its expiration date to prevent the risk of foodborne illness. Stay safe and enjoy your mayo responsibly!

Authoritative Food Safety References

These agencies and university labs inform every tip and health precaution we publish.

USDAOfficial guidance

USDA FoodKeeper – Cold Storage Guidelines

Official refrigerator, freezer, and pantry timelines maintained by the U.S. Department of Agriculture.

Visit USDA FoodKeeper
FDAOfficial guidance

FDA Produce Safety Rule & Grower Guidance

Field-to-fridge handling practices that prevent contamination of fruits, vegetables, and leafy greens.

Visit FDA Produce Safety
CDCOfficial guidance

CDC Foodborne Illness Prevention Hub

Surveillance-backed guidance on pathogens, symptoms, and steps to reduce foodborne illness risk.

Visit CDC Food Safety
ResearchUniversity research

Penn State Extension – Home Food Preservation & Safety

Peer-reviewed extension bulletins on safe canning, chilling, and reheating practices.

Visit Penn State Extension
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Our articles are created using a combination of AI assistance and human review. All food safety information is based on USDA guidelines and credible sources. Learn more about our review process here.