How Long Does Mayonnaise Last?
Mayonnaise lasts 2 months when stored in the refrigerator. Discard if you notice change in color or texture or off or sour odor. Store properly to maximize freshness and safety.
Mayonnaise lasts 2 months under proper refrigerator storage. Always inspect before use if approaching the end of this window.
Refrigerator
2 months
Pantry (Unopened)
3-4 months past printed date
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Can I Still Use This Mayonnaise?
Quick decision guide based on how you stored it:
In the fridge
Safe for 2 months. Check for spoilage signs before use.
In the fridge (opened)
Use within 2 months. Cover to prevent contamination.
Left out at room temp
Pantry-stable for 3-4 months past printed date if sealed.
Left out at room temp (opened)
Opened and unrefrigerated — use immediately or discard after 2 hours.
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Mayonnaise Shelf Life by Storage Method
| Storage Method | Duration | Safety Level |
|---|---|---|
| Pantry / Room Temp (Unopened) | 3-4 months past printed date | SAFE |
| Refrigerator | 2 months | SAFE |
About Mayonnaise
Mayonnaise shelf life information including storage tips and signs of spoilage.
Signs Mayonnaise Has Gone Bad
- Change in color or texture
- Off or sour odor
- Presence of mold
- Separation or excessive liquid
How to Store Mayonnaise Properly
- Keep mayonnaise refrigerated after opening
- Always use a clean utensil to avoid contamination
- Store in original container with lid tightly closed
Safety Notes & Expiration Risks
Consuming expired mayonnaise can lead to foodborne illness due to bacterial growth, including pathogens like Salmonella. Spoiled mayonnaise may cause gastrointestinal symptoms such as nausea, vomiting, and diarrhea.
Common Questions About Mayonnaise Safety
Is mayonnaise still safe after being left out overnight?
Mayonnaise that is shelf-stable and was sealed can generally be left out overnight without safety concerns. However, if it was opened or is a perishable variety, the USDA 2-hour rule applies — discard any perishable food left in the "danger zone" (40–140°F) for more than 2 hours.
Can you eat mayonnaise that smells fine but is past its expiration date?
"Best by" and "sell by" dates on mayonnaise typically indicate peak quality, not a hard safety cutoff. If mayonnaise smells normal, shows no visible mold or discoloration, and has been stored properly, it is often safe shortly past the printed date. However, use your judgment and when in doubt, discard it.
What does it mean if mayonnaise has changed color or texture?
Minor color changes in mayonnaise may be natural and do not always indicate spoilage. However, significant discoloration, mold growth, unusual sliminess, or a major texture change typically means the product has degraded. If the change is accompanied by an off smell, discard the product. When only the color has shifted slightly and everything else seems normal, the product may still be usable but is past peak quality.
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Frequently Asked Questions
How long does Mayonnaise last?
Unopened mayonnaise lasts 3-4 months past the printed date; once opened, it should be used within 2 months if refrigerated.
Does Mayonnaise expire?
Yes, mayonnaise can expire and spoil, especially after opening and improper storage.
How can you tell if Mayonnaise has gone bad?
Signs include changes in color or texture, sour or off odors, mold growth, and separation of liquids.