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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 ...

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 ...

www.pantryguide.com/condiments/how-long-does-mayonnaise-last

As mentioned earlier mayo most often comes with a "best by" or "sell by" date. These dates aren't expiration dates and mayo can be consumed quite a lot of time after those dates. That it, of course, if it was stored properly and the jar is intact. See the how long does mayo last section for more information.

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

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 solution is to purchase irradiated eggs, which are now available in most markets.

www.paleohacks.com/mayonnaise/how-long-does-homemade-mayo-last-12825

How long will homemade mayo last in the refrigerator? Organic mayo from the supermarket seems to last a while. Is there some way to tweak the recipe to last a week if it doesn't?

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

After a few months, the color and/or flavor may deteriorate, but the mayonnaise will generally be safe to consume if your refrigerator temperature is at or below 40°F. It’s a good idea to write on the label the date you open the jar so that you’ll know when the quality is beginning to deteriorate.

answers.yahoo.com/question/index?qid=20070113095244AAQj5u8

A very long time. Months. Keep it refrigerated once opened. Just make sure you periodically scrape the inside of the jar so that what's on the sides doesn't become yucky, or even transfer it into a smaller container with a tight seal to make it last even longer.

lifehacker.com/heres-how-long-those-small-condiment-packets-last-befor-1752571188

You open up your cupboard, or take a peek in your camping cooking supplies, and you find a bunch of old ketchup packets. Are they still good to eat? How long do they last? Let’s find out.

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

Is It Dangerous to Leave a Sandwich With Mayo on It Out for Several Hours? ... Homemade mayonnaise is simple to make, and you can whip up gourmet versions by adding dill, chipotle chili powder or grainy mustard. Just be sure to use a pasteurized egg product rather than fresh eggs in the mayonnaise. ... How Long Can Guacamole Sit Out Before It ...