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www.stilltasty.com/fooditems/index/17668

How long does mayonnaise last once opened? The precise answer depends to a large extent on storage conditions - keep opened mayonnaise refrigerated and tightly covered at all times. How long does opened mayonnaise last in the refrigerator? Mayonnaise that has been continuously refrigerated will generally stay at best quality for about 2 to 3 ...

shelflifeadvice.com/content/how-long-should-jar-mayonnaise-be-kept-once-it’s-been...

How long can I keep refrigerated leftovers? I Left It Out Too Long! Can I Still Eat It? It Says "Use By Tomorrow," But You Don't Have To. By Ethel Tiersky. Jul 02, 2009. Kraft recommends that opened, refrigerated mayonnaise be discarded after 3 – 4 months (or 30 days after the expiration date if that comes sooner). The USDA says 2 months ...

www.eatbydate.com/other/condiments/mayonnaise-shelf-life-expiration-date

How long does mayonnaise last? How long does Miracle Whip last? Unopened mayonnaise will last at least a week beyond a "best by" date, erring on the safe side. The shelf life of mayonnaise regardless of such things as the sell by date, use by date, or best before date is not very long. Mayonnaise, or Mayo for short, despite it's high ...

oureverydaylife.com/refrigerate-mayonnaise-after-its-opened-21639.html

Mayonnaise is best when refrigerated after opening, but the reasons for refrigeration have nothing to do with bacteria or food poisoning. The mayonnaise from the supermarket undergoes strict quality tests. Also, using mayonnaise in a sandwich does not cause the sandwich to spoil more quickly.

www.thespruceeats.com/mayonnaise-spoilage-myths-and-safety-1808083

Homemade mayonnaise will last only up to a week when properly refrigerated. The good thing is that it is quick and easy to make your own mayo, so if you prefer your mayonnaise homemade, you should not need the convenience of jarred mayonnaise except for that last-minute sandwich. If you are not comfortable using raw egg yolks, the perfect ...

www.reference.com/food/long-mayonnaise-last-29124086216c5c68

How Long Does Mayonnaise Last? Unopened, commercially produced mayonnaise is almost indefinitely shelf stable. Once opened and refrigerated, it may remain safe to consume for two to three months beyond its "purchase by" date.

www.answers.com/Q/How_long_does_mayonnaise_stay_fresh_in_the_refrigerator

How long can foods with mayonnaise stay in refrigerator? This food can last up to 4 or 5 days in the refrigerator. A good rule id to date your left overs and do not eat anything over 5 days.

outdoors.stackexchange.com/questions/1265/how-long-does-mayonnaise-last...

However, if either type of mayonnaise is cross-contaminated by foods such as raw beef, unclean utensils, or E. coli O157:H7-infected food handlers after commercially processed containers are opened, the pathogen may survive at 58C for several weeks. No one can tell you exactly how long it will last.

www.quora.com/How-can-a-Hellmans-Mayonnaise-squeeze-bottle-sit-unrefrigerated...

How can a Hellman's Mayonnaise squeeze bottle sit unrefrigerated on a restaurant table without going bad? ... it's best to keep your mayo at refrigerator temperature once the package has been opened. (Before it's opened, it's sterile.) ... How long does opened mayonnaise last in the refrigerator?

oureverydaylife.com/dangerous-leave-sandwich-mayo-out-several-hours-27470.html

Commercial mayonnaise contains pasteurized eggs, as well as vinegar and salt or lemon juice. These ingredients acidify and preserve mayonnaise, so it's actually a very safe product. Of all the ingredients in your sandwich, mayonnaise is probably the least problematic one, unless you're using homemade mayo made with raw eggs.