Don’t Throw It Out: How Long Mayonnaise Lasts After Opening and How to Extend Its Life

We’re used to mayonnaise being a loyal companion to many dishes, but do you know how long it can stay open in the refrigerator before it turns into a potentially dangerous mixture for your health?

Mayonnaise, a sauce beloved by many, has long been a staple in our refrigerators. It complements salads, sandwiches, and serves as a base for other sauces. However, we often forget that its shelf life after opening is significantly different from what is indicated on the label. While homemade mayonnaise spoils in just a few days, store-bought versions “live” a bit longer thanks to preservatives. Let’s figure out how to properly handle this popular product so it’s not only delicious but also safe.

Store-Bought vs. Homemade: What’s the Difference in Shelf Life?

The moment you open the jar or packet, the countdown begins. For store-bought mayonnaise, which contains preservatives, this period is quite long. Manufacturers usually state on the label that it can last for 2-3 months after opening. But it’s always wise to check the specific instructions on the packaging, as the composition can vary.

Homemade mayonnaise is a completely different story. It has no artificial additives, which makes it vulnerable. Due to its high content of eggs and oil, it spoils quickly. Therefore, homemade sauce should be consumed within 3-5 days to maintain its fresh taste and, most importantly, to prevent the growth of harmful bacteria.

Where and How to Store Mayonnaise to Make It Last Longer?

Even if you adhere to the specified timeframes, it’s important to know how to store the product to keep it from spoiling prematurely.

• Location matters. You’re probably used to storing mayonnaise on the refrigerator door. But this is the worst place for it! The door is constantly being opened and closed, which causes temperature fluctuations. It’s better to move the jar deeper into the refrigerator, to one of the main shelves, where the temperature is more stable and lower.
• Airtightness is key. After each use, make sure you tightly close the lid. Contact with air accelerates oxidation and spoilage of the product.
• Clean utensils. If you use dirty utensils to scoop out mayonnaise, you introduce microorganisms into the jar. They multiply actively and shorten the product’s shelf life. Always use a clean spoon.
• Freezing is a bad idea. While mayonnaise can be frozen, we don’t recommend it. When thawed, it almost always loses its smooth texture, becoming separated and grainy. So it’s better to consume it in time rather than end up with a spoiled product.

By following these simple rules, you can enjoy the taste of fresh mayonnaise and be confident in its quality.