What Happens If You Eat Expired Mayonnaise?

Have you found a jar of expired mayonnaise in your fridge but can’t eat it as you are afraid of upsetting your stomach? You don’t have to worry as we have the answer to your queries regarding what happens if you eat expired mayonnaise?

So, when you found long ago brought mayonnaise jar which was lost somewhere in your fridge. Ultimately, the jar being expired makes you skeptical about using it or not, as you do not want to have a hefty season of food poisoning or an upset stomach. 

Whether made at home or brought from the market, mayonnaise comes up with an expiry date. Let’s have a look over what happens if you eat expired mayonnaise?

Is It Safe To Eat Expired Mayonnaise?

If you are using homemade mayonnaise or market-brought mayonnaise, both have their own shelf life. Mayonnaise is usually made up of raw eggs or another substitute. Dairy products have a life expectancy, and when they rot, they are very volatile to eat. 

Mayonnaise is unlikely to cause food poisoning, but the product that typically mayonnaise has can cause fatality. Dairy and meat products, such as sliced cheese, milk, tuna fish, and preserved deli meats, all contain bacteria that can cause food poisoning. 

What Happens If You Eat Expired Mayonnaise

However, it is safe to eat expired mayonnaise only if it does not have any signs of mold or spoilage. If there is any spoilage, then it must have harmful bacteria. Harmful bacteria will, in turn, make your stomach upset or may cause food poising.

Even though you can consume expired mayonnaise but make sure to eat it only if it tastes well. However, if the smell and taste feel like vinegar or acidic, you must toss the mayonnaise off. Changes in the texture or smell are some apparent signs that mayonnaise is not fit to consume.

What Happens If You Eat Expired Mayonnaise?

Now you must be wondering if ever you eat expired mayonnaise, then what can happen? Most probably, you can have food poisoning or an upset stomach. Due to the harmful bacteria, the nature of expired mayonnaise turns acidic.

Even though you get an infection readily, there are very low risks. Still, it depends on the rate at which the bacteria multiply. If you ever eat expired mayonnaise, you can develop stomach aches. Moreover, you can have nausea and diarrhea as well.

However, if your mayonnaise has been made up using unhygienic eggs, then you can get contaminated with salmonella. This salmonella can give you a salmonellosis infection. In the end, you will have typhoid and may have a digestive disorder.

Furthermore, if your mayonnaise jar is expired, you can still have it. If the mayonnaise tastes acidic, then it is already time to let go of the jar you have been holding for a while. Otherwise, you can use it until it tastes or smells acidic.


When Does Mayonnaise Expire?

Every jar of mayonnaise, ketchup, or mustard sauce you own has its expiry dates. Sooner or later, they may get rot and will be unfit for use. What matters is that; you must acknowledge when it expires. 

Usually, mayonnaise jars have a shelf life of 4-6 weeks if placed in a refrigerator. At the same time, the best before date is generally up to 2 or 3 weeks. However, if you rely on these expiry dates, then you will have every edible just for one-time use. 

Besides, if mayonnaise has no artificial products, then there is a possibility that it can last longer. Ingredients like; beef, and pickles can rot way earlier than any other ingredient.

A jar of mayonnaise, when opened, can last well for up to 4-6 weeks when refrigerated. Moreover, if the jar is kept in a cool place, it can last longer for a year or longer. Besides, an unopened jar out of the fridge can last for a good 2 to 3 months.

TypePantry Past Printed Date
 Unopened Mayonnaise lasts for 2-3 months
Opened Mayonnaise lasts for 1-2 weeks
Table : Mayonnaise Expiration

However, avoid touching the jar with your bare hands or fingers. Getting contaminated will expire the mayonnaise early than expected. Moreover, the quality of the condiments also plays a vital role while determining the expiration.

How Do You Know If Mayonnaise Is Expired?

If you store mayonnaise properly, it will undoubtedly take a long time to spoil. However, it may be challenging to figure out whether the mayonnaise is expired or not. After all, you can’t rely solely on the expiry date stamp on the jar.

You can quickly figure out whether the mayonnaise you are having is good to use or not by looking at it. A mayonnaise, when expired, has some odd attributes. It may include separated oil layers, changes in texture, and many more. 

When you are looking out for an expired jar of mayonnaise, look out for molds on the surface of the mayonnaise, also over the sides. Besides, if the mayonnaise is expired, then it will smell acidic because of vinegar.

Some other characteristics may include a lump or thick texture. Besides, the vinegar smell is the most apparent sign of rot. However, if you notice any such signs, then be sure to get rid of that jar as soon as possible.

How To Tell If Mayo Is Bad?

If you have been using mayonnaise made up of unhygienic eggs, then the mayonnaise is not good to use. Moreover, the mayonnaise that is unfit for eating will be yellowish. Also, there will be a lot of lumps in the texture as well. 

Apart from these visible signs, look out for the molds over the surface or the inside neck of the jar. The contaminated bacteria will makeup molds, which in turn will be visible to you. Besides, the odor is the best way you can decide whether your mayonnaise is good or not. 

However, you can quickly tell how bad your mayo is by looking out for molds on the inside of the jar. Moreover, a putrid smell will also give an idea about the expiration. Apart from this, the change in color and weird taste will provide you with the idea that the Mayo is not good to use now.

What Does Expired Mayo Look Like?

An expired Mayo will have a thick and lumpy texture, and the color will be a little bit yellow and will turn darker as time passes. Apart from this, you have to consider the texture and color of the mayonnaise as well.

If your mayonnaise is expired already then, it will have a dirty yellow color. Besides, the texture will be thick, having a lot of lumps. 

Furthermore, it will also have a separate layer of oil. Such are the obvious signs that your mayonnaise is no more edible.

Does Mayo Go Bad In Fridge?

Mayonnaise, whether made at home or brought from the market, will have eggs. Anything containing eggs is termed a dairy product. A dairy product that does not store in a cool place can go bad sooner than expected.

Mayo can last up to months while being refrigerated. Also, Mayo can stay fresh in the fridge only if it is unopened or has good-quality of condiments. If it is kept outside open, then mayonnaise will eventually go bad.

To make your mayonnaise edible for an extended time, you must store it at a cool place, most preferably a refrigerator. Moreover, a cooler environment will make the additives in your mayonnaise fresh and last longer than usual.

The Shelf Life Of Homemade Mayonnaise

The shelf life of homemade mayonnaise is limited. As it contains eggs, it is necessary to store homemade mayonnaise in a refrigerator. Even then, it can only last up to some days. However, you can also use some air-tight containers to store your mayonnaise.

Homemade mayonnaise can only be stored for a week or two. Try to ensure that you store the mayonnaise in a container that has an air-tight lid. If you protect your homemade mayonnaise from contaminated air, then you can enjoy it for a little bit longer period.

Storage Form Time Duration
Homemade (in an open container) 3-4 days
Homemade (in an airtight container) Up to 2 weeks
Table : Self life of Homemade Mayonnaise

The Shelf Life Of Bought Mayonnaise

Market-brought mayonnaise have a lot of added preservatives. Due to the preservatives market, bought mayonnaise has a longer shelf life. Although these mayonnaises have their expiry date mentioned, they are still edible if they are presentable. 

The shelf life of an excellent market-bought mayonnaise can last up to a year or so if unopened and stored at a cool place. Even after opening it and keeping it at appropriate play, you can enjoy it for a more extended period. 

However, everything depends on the taste, texture, and smell of the mayonnaise. If it is odd, then it is not edible. However, if it smells and seems perfect, then it is ready to eat.

Mayonnaise (unopened) Up to 3-4 monthsUp to a Year
  Mayonnaise (opened) A week or so Up to 6-8 months
Table : self life of brought mayonnaise


To sum it up, it is better to know the consequences before trying out anything, as you do not want to have an upset stomach. Every product comes up with an expiry date. However, with mayonnaise, you can tell if it is edible or not by looking at it or smelling it.

Besides, we hope that now you have an idea about what happens if you eat expired mayonnaise? Although you can easily recognize an expired mayonnaise from its texture. Additionally, this article has provided you with a shelf life for different mayonnaises. 

Mike Monteleone

My name is Mike Monteleone. I am the author of Kitchenaries.com. Since I was very young I have been passionate about cooking and everything that surrounds the art of preparing food. Cooking is much more than a set of techniques. Cooking is a means of expression and it is an art. Whether you are a three-star Michelin chef or an amateur cook, cooking is a universal language that allows you to share and explore.

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