✓ Has it been open for a reasonable amount of time?
✓ Does it still look normal?
✓ Does it smell normal?
✓ Is there no mold or unusual growth?
✓ Has it been handled with clean utensils?
If several answers make you uncomfortable, don’t risk it.
Mayo is inexpensive compared with the consequences of eating spoiled food.
Frequently Asked Questions
How long does opened mayonnaise last in the fridge?
Commercial mayonnaise is commonly recommended for use within about two months after opening when continuously refrigerated and properly handled, although product-specific guidance can differ.
Does unopened mayo need to be refrigerated?
Commercial mayonnaise is generally shelf-stable while unopened, provided the label does not require refrigeration. Once opened, it should normally be refrigerated.
Can mayo go bad in the refrigerator?
Yes. Refrigeration slows spoilage but doesn’t stop it indefinitely. Older mayonnaise can eventually develop unpleasant odors, discoloration, mold, or changes in texture.
Can you eat mayo after the best-by date?
A best-by date primarily concerns quality, but you should also consider storage conditions, whether the jar has been opened, and signs of spoilage. When in doubt, discard it.
What happens if mayonnaise is left out overnight?
Mayonnaise that has been left unrefrigerated overnight should generally be discarded, particularly if it has been at room temperature for many hours.
Can you freeze mayonnaise?
You can freeze it, but the texture may separate after thawing. Refrigeration is generally preferable.
How long does homemade mayo last?
Homemade mayonnaise has a much shorter refrigerated shelf life than commercial mayonnaise, particularly when made with raw eggs. Follow the recipe’s storage instructions and use it promptly.
The Bottom Line
So, how long does mayo last in the fridge?
For commercial mayonnaise, an opened jar is commonly treated as having a refrigerated life of roughly two months, but there isn’t one universal timeline that applies to every product or situation.
The most important factors are proper refrigeration, clean handling, the manufacturer’s instructions, and the condition of the mayonnaise itself.
If you notice mold, a strong unpleasant odor, significant discoloration, or an unusual texture, don’t try to rescue it.
When you’re unsure, it’s better to replace the jar than take a chance.
A little attention to storage can keep your mayonnaise fresh, creamy, and ready for everything from sandwiches and burgers to potato salad and homemade dressings.
