How Long Does Mayonnaise Last? Shelf Life, Storage, Expiry

How to store mayonnaise?

Unopened store-bought mayo should be stored in a cool and dry area, away from light. The pantry is the perfect place for it. If that’s not a possibility, storing it in room temperature is pretty much okay too. Once you open the jar, it should be transferred to the refrigerator and kept in there if not in use.

When it comes to homemade mayo, it should always be stored in the fridge.


What is a good substitute for mayonnaise?

Use these, instead.
  • Avocado: Creamy and dense, like mayo.- Smear on sandwiches, andsave 77 calories, 9g fat, and 89mg sodium per tablespoon.
  • Hummus: Nutty and fluffy.
  • Greek Yogurt: Tart and tangy like mayo, same texture, too.- Youcan use this sub in basically any recipe.
  • Pesto: Oil-based, like mayo.
  • Nut butter.

How to store Mayonnaise to extend its shelf life?

Refrigerate mayonnaise right after opening and keep it there all the time, except for the brief time to spread it on your sandwich of course.

Some benefits of proper food storage include eating healthier, cutting food costs and helping the environment by avoiding waste.

How long is tuna fish with mayo good for in the fridge?


To maximize the shelf life of tuna salad forsafety and quality, refrigerate the tuna salad in airtightcontainers. Properly stored, tuna salad will last for 3 to 5days in the refrigerator.

How to Store Mayonnaise the Right Way: The Dos Donts!

Mayonnaise is made using raw chicken eggs. Due to this, proper storage is necessary to keep it safe to eat. Mayo can get spoiled or contaminated very easily.We have some do’s and don’t to keep your mayonnaise fresh for longer:

  • Never keep your mayonnaise at room temperature for more than 2 hours. According to USDA, you can keep your mayo at room temp for almost 8 hours.But we think this is not safe as we all live in different climates. If you live in a humid environment, your mayo will not last 8 hours.
  • Keep your mayo always in the refrigerator. Don’t freeze your mayonnaise.
  • It’s better to buy those squeeze mayo bottles instead of jars s bottles that have less contamination. Each time you use a spoon to grab some mayo, the whole jar gets contaminated and it reduces the shelf life.
  • Don’t microwave your mayo to bring it to room temperature. 

5 Tips to Tell if Mayonnaise Has Gone Bad

Even though mayonnaise lasts for a long time before going bad, you should check it regularly. Several proven signs indicate your mayo is not safe to use. Let’s see.


First, check how your mayo looks. If you notice separated layers at the jar top or liquid collecting in the hole left by your spoon, you can be sure that it has become spoiled. Since bacterial overgrowth causes this, you should do the best to avoid food poisoning.

In some cases, you may spot the oil separated on the surface of dark yellow mayonnaise. It is a sign that it is quite old. In the end, the occurrence of lumps will show that your mayo has got spoilt.


Instead of being creamy white, spoiled mayonnaise is a bit yellow or even brownish. Experts agree that any discoloration indicates that it has stayed too long in an open jar or your food is contaminated somehow.


The acidic or putrid mayo smell should warn you to avoid this jar since your delicacy is no longer safe to use. In fact, any unusual odor is a sign to throw the jar in the trash.


Even though you keep your mayo in the fridge for long, it is edible as long as its taste is pleasing. Once it stays tasting off or unpleasantly, it has probably gone bad.


When your mayo is not stored appropriately, you can see mold growing around the jar neck or inside it. There is no way to save it by changing the container since the mold has already affected all the content. As a result of consuming such mayonnaise, you may have a health issue.

It is the same when noticing spores in your mayo. Their presence is a sign that it is no longer safe to use, and you need to throw it away.


Is mayonnaise safe for pregnancy?

Unless otherwise stated, commercially-prepared mayonnaise is pasteurized. This process eliminates Salmonella and other harmful bacteria causing foodborne diseases. On the other hand, homemade mayonnaise should be avoided because the egg is unpasteurized. (*)For further information, check the manufacturer’s website. It’s also advisable to consult your physician regarding permissible foods during your pregnancy.

Can you freeze mayonnaise?

Freezing mayonnaise is discouraged by most manufacturers. Although safety aspects are not likely affected, thawing results in separating liquid, and you’ll find it gross and unappealing.

Is mayonnaise dairy? Mayonnaise is made from at least oil, egg yolk, and acid (vinegar or lemon juice). So, mayonnaise is not a dairy product, since it doesn’t contain milk and its derivatives. Don’t forget to check the label for the ingredients list and allergen information if you have a dietary restriction.

Final Thoughts

Mayonnaise is a must-have condiment in many households. Similar to other sauces, mayonnaise also loses its flavor as time goes by and eventually goes bad.

Store-bought mayonnaise is shelf-stable. Unopened jars can safely sit in a dry, cool place. After opening, you can keep it both at room temperature or refrigerated. However, refrigeration is highly recommended to preserve the texture and flavor for longer storage.

Homemade mayonnaise should be kept refrigerated all the time. It is perishable and should be finished within a few days.

If you spot darkened color, molds, or sour smell and taste, mayonnaise is spoiled and no longer safe for consumption.

Up Next: Best Substitutes For Mayonnaise

*Photo by AndreySt/depositphotos

*Photo by AndreySt/depositphotos



How To Tell If Mayonnaise Goes Bad

Let’s start by examining the container. If you have an unopened jar that looks damaged, such as swollen, leaking, dented, etc., don’t use it. Chances are mayonnaise is spoiled and no longer safe to use.

With proper storage, mayonnaise doesn’t quickly spoil. However, the flavor and taste slightly degrade over time. At some point, you may want to discard leftover mayonnaise because it’s not appealing anymore.

Telling mayonnaise going bad is not so difficult. You can always rely on your nose and eyes.

Common signs of mayonnaise going off include sour or putrid smell, presence of molds, yellowish, or darkened color. If you spot any of these signs, there’s no better option than to throw it out.

If your mayonnaise has separated liquid, this is a regular occurrence. It usually happens if you don’t use the sauce for a long while. As long as no other spoilage signs are spotted, it should be fine to consume. Give it a good stir to fix the consistency.

Frequently Asked Questions

01. How Long Does Homemade Mayo Last?

Homemade mayo contains no preservatives so it does not last as long as store-bought mayonnaise. If you keep your homemade mayo in the refrigerator, it will last 3-4 days. 

You can extend the shelf life of your homemade mayo by fermenting it. After fermenting your mayo for 5-6 hours, it can last up to 2 months in the fridge. 

02. Does Mayonnaise Need to Be Refrigerated?

Mayonnaise contains egg yolks and oil. Egg yolks do not survive well at room temperature. You need to keep your mayo in a cold environment to prevent molds from growing inside. 

According to the USDA, mayonnaise can not reach above 50° Fahrenheit. Anything above that spoils the mayo and causes it to separate. 

03. How Long Does Mayonnaise Last after Opening?

Once you open a jar of mayo, it will last you up to 2 months. Before it’s opened, a jar of mayo can last in the refrigerator for about three months or until it expires. 

04. How Long Can Mayo Stay Out?

Mayonnaise can sit at room temperature for up to 8 hours according to the USDA. any open mayonnaise jar that sits above 50° Fahrenheit for more than 8 hours needs to be tossed out. 

So if you accidentally leave your mayonnaise on the countertop overnight, it is still safe to eat. Just quickly put it back in the refrigerator. 

05. Is Hellmans Mayo Pasteurized?

Hellmann’s mayonnaise is known for its 100%free range of chicken eggs. So their mayonnaise is pasteurized and safe to eat. If you’re pregnant or have some health limitations, using Hellmann’s mayo instead of a generic one is safer and arguably better for you. 

06. Where Does Mayonnaise Come from?

Some people say mayonnaise comes from Spain, specifically Mahón. There are Spanish recipe books dated as far back as the 14th century that mentions a sauce using egg, oil, and garlic. It was called all-i-oli. 

The first time we saw mayonnaise in European cuisine was in the 1750s, where it was published in a cooking book and was called aioli bo. Aioli literally translates to garlic and oil. So we can say mayonnaise has been around for centuries. 

07. How Long is Mayonnaise Good for after the Expiration Date?

If you store your mayonnaise according to the USDA guidelines, it will stay fresh and edible for 3-4 months past the expiration date. The expiration date is a mere suggestion for the consumer.It’s not definite. Food can go bad before the expiration date and also can stay safe months after it. 

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