Does Xylitol Go Bad? How Long Does Xylitol Last?

As a sweetener substitute, sometimes xylitol sits in the back of your cabinet for years, and you may be wondering does xylitol go bad? Since it is not used as often as other products, it can sit around your house for a more extended period.

Quick Answer

Xylitol can have an indefinite shelf life but will lose flavor over time. Most xylitol packets do contain a best by date, and most manufacturers recommend it be used within two years of that date. Anything longer than that, the xylitol will not go bad but will not have the same sweet flavor it is utilized for.


Read on to learn how to properly store xylitol and the warning signs for if xylitol has gone bad.

Does Xylitol Go Bad? How Long Does Xylitol Last?

Due to Xylitol being a reasonably new product, there isn’t much research into its shelf life. It is pretty challenging to determine if it has an extended expiration date or how long it stays usable.

How Long Does Xylitol Last Outside?

Xylitol should be stored in the pantry away from heat. It is pretty like sugar and absorbs moisture if any does come in contact with it. If it is unopened and kept out of heat and humidity, the xylitol can be good for a long while after its expiration date.

If the xylitol package is opened, it needs to be transferred to an airtight container. If left unopened, the package can split and allow moisture to be introduced to the ingredients.

Xylitol will last until it starts to lose flavor. Typically if appropriately stored, the xylitol can last in the pantry for up to two years.

How Long Does Xylitol Last in the Fridge?

Xylitol should not be stored in the fridge. The cold can cause the xylitol to turn, and the refrigerator can build moisture and condensation in the xylitol if not correctly stored.

The cold does not stop the turning process and will just keep the sweetener cold. The xylitol will be okay and remain usable, but the fridge’s moisture could destroy it.

If the xylitol is left open in the fridge without airtight containers, moisture will more easily get into the container, and coldness creates more condensation in the ingredients.

How Long Does Xylitol Last in the Freezer?

Xylitol should not be stored in the freezer. The freezer’s coldness can create condensation in the xylitol and cause moisture in the bag that can cause it to turn.

If you choose to place the xylitol in the freezer, make sure it is in an airtight container. The container will keep moisture out and cause it to be kept indefinitely.

The freezer is good if you have had to buy a lot of xylitol, but you need to check on the bag and make sure no moisture is getting into it.


To properly store xylitol, it should be stored in the pantry. The coolness and dryness are perfect for xylitol storage and keeps it suitable for a more extended period.

How To Tell If Xylitol Has Gone Bad / How To Know Xylitol is Fresh?

There are many different ways to tell if xylitol has gone wrong and should be thrown out.

Appearance: If you notice any mold spots or moisture in the bag, you should throw it out. These two things can cause the xylitol to spoil quickly and become unusable.

Smell: If the odor is off or absorbed another scent, it is probably unsafe to use. There should be a sweet smell associated with the sweetener, not one of any other smell.

Taste: The taste of xylitol should be a sharp, sweet taste. If you notice that the flavor is waianing, you should throw it out.

How to Store Xylitol?

Xylitol should be stored at room temperature in a pantry, but you need to make sure it is stored correctly.

Container: If the bag of xylitol is open, it should be moved to an airtight container. An airtight container will keep the moisture out of the xylitol. If the bag is sealed, keep it sealed till you need it and then transfer it to an airtight container.

Store: Place it in the pantry away from light and heat. It will keep the xylitol from spoiling too quickly.

Can You Freeze Xylitol? How?

It is possible to freeze xylitol, but it is not recommended due to the moisture collected when something is frozen.

Container: Place the xylitol in an airtight container or a freezer bag. This will keep the moisture and oxygen out of the xylitol.

Store: You can place it in the freezer for up to two years. Make sure you are checking it for possible moisture contamination and ruining of the xylitol.

How to Thaw Xylitol?

To thaw xylitol, you need to make it as moisture-free as possible.

Fridge: If you are going to thaw xylitol in the refrigerator, you need to make sure it is wrapped in something like a paper towel to soak up the moisture. If you place the xylitol in the fridge overnight, it should thaw out.

Room Temperature: It is possible to thaw xylitol at room temperature, but you need to make sure it is wrapped in something to absorb moisture. Place the xylitol in a container and make sure it thaws for a little while and it will be usable.

Frequently Asked Questions About Xylitol’s Shelf Life

What are the negative effects of xylitol? If you overeat xylitol or spoiled xylitol, you can retain too much water, and it can cause gas, bloating, or even diarrhea. This can be a symptom for people who may have an intolerance or just sugar poisoning.

Does xylitol kill gut bacteria? Xylitol can kill bacteria in your mouth and gut. This can cause some stomach issues for people and can end up leading to more health problems.

Wrap Up

Now that you know how to store xylitol properly, you can make healthy decisions and understand what to do with the leftover xylitol in your pantry.

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