How Long does Yeast Last in the Fridge?

So let’s start! If you’re wondering how long yeast keeps in the fridge, don’t worry; You have come to the right site; This article contains all the information you need on the shelf life of yeast, as well as advice on determining whether you can ferment food that is currently in the package. Also, here, you will learn how to store yeast to extend its shelf life and how you can determine if your yeast is bad or rotten and what are the risks of eating bad yeast.

How Long Does Yeast Last in the Fridge

How Long does Yeast Last in the Fridge?

Whether fresh or dried, the product’s shelf life varies, with fresh yeast losing its power more quickly than dry yeast. Dry yeast (active dry or instant) in opened packages can be kept in the fridge for three to four months. Here is some information about the types of yeast and their shelf life

Shelf Life of Fresh Yeast

Fresh yeast has a relatively long shelf life when stored in the fridge. It will usually last for about two weeks. However, keep it in the freezer if you need to keep it longer. This will extend its life dramatically. Additionally, you can preserve it in the fridge in an airtight jar. However, please keep it in a cool place to prevent the growth of bacteria.

While fresh yeast is usually safe for about two weeks in the fridge, active dry yeast has a much longer shelf life. If you keep it in an airtight container, the yeast should last for at least four months. Once it has been opened, the shelf life will be significantly less. It is also a good idea to freeze fresh yeast in a sealed container, which should be kept in the refrigerator. This will help prevent the yeast from deteriorating.

Shelf Life of Dry Yeast

Dry yeast has a long shelf life, at least two years, when unopened. Chilling it further extends its shelf life, so many bakers prefer to store it in the fridge or freezer. However, it is important to remember that expired yeast will only last as short as fresh yeast.

When storing yeast in the fridge, store it in a sealed container. This will preserve its potency and prevent the yeast from deteriorating. Keeping yeast in the refrigerator is best done at least three weeks after production. It is possible to freeze leftover yeast for up to five months. However, if it is not completely sealed, it will last up to six months.

The fridge’s shelf life of dry yeast is approximately three to four months. However, it may last for up to 2.5 years if properly stored. You can check the yeast’s quality by proofing it with a teaspoon of sugar, two tablespoons of yeast, and one-quarter cup of warm water. Please wait 10 minutes and check to ensure it is still viable. It is also worth freezing the yeast to stay fresh for longer.

The shelf life of dry yeast in the refrigerator depends on storage conditions and strain. The recommended temperature range is 68 degrees F (20C). However, higher temperatures may kill yeast faster. It will still work fine if you don’t use the yeast within this period. You can even use expired yeast, but the expiration date should be checked carefully.

Shelf Life of Active Dry Yeast

Active dry yeast is stable for at least three months in a refrigerator if kept in a cool, dry place. It can also be kept for up to two years in the freezer. It should be placed in a cool, dry, sealed container. The shelf life of active dry yeast in the fridge is up to four months, while instant yeast is good for two to six months. It is also possible to store instant yeast in the freezer, but this type of yeast has a shorter shelf life.

However, some bakers prefer fresh yeast because it has a more robust flavor and texture. The shelf life of active dry yeast in the fridge varies depending on its storage condition. It should be kept in the fridge or the freezer after opening. To enhance its shelf life, it should be stored in a tightly closed container or a plastic freezer bag that can be resealed. Active dry yeast is best stored between 33 and 38 degrees F. Younger yeast should foam up, while older yeast may not.

If you’re unsure if the yeast is fresh, try cutting a small slice. If it’s foaming up, the yeast is still active. While active dry yeast can be stored in the fridge for several months, it cannot be used after the expiry date listed on the package. If you buy it before the expiration date, it should still be used within two to three days. After that, it has lost its efficiency and will not rise in your baked goods.


How should Yeast be Stored to Increase its Shelf Life?

Yeast is a live organism that, like yogurt cultures, gradually loses activity over time. Like most foods, it deteriorates considerably more quickly in the presence of air, moisture, and heat. Unopened packages should be kept in the cabinet or another cool, dry location (the refrigerator is fine, too but not necessary until it is opened).

Dry yeast can be frozen for up to 6 months after opening as a long-term solution. It must be placed in a refrigerator (or frozen) in an airtight container when the package or jar is opened, with as much air pushed out as possible. Only take out what you want from the refrigerator or freezer around 30 to 40 minutes before use.

Dry yeast should always be warmed to room temperature before use. Cake yeast, also known as compressed yeast, is much more perishable than dry yeast and must be kept refrigerated constantly at or below 45°F to keep it fresh and active.

Always carefully wrap any leftover cake yeast before storing it in the fridge in an airtight container. Cake yeast should not be frozen. Healthy nutrition, lower food expenditures, and environmental protection through waste avoidance are a few advantages of proper food storage.

How can I Determine if my Yeast is Spoilt, Rotten, or Bad?

When yeast ages, it finally transitions from a light tannish grey to a darker brown color and clumps. When you notice these alterations, the yeast is no longer good. Avoiding foodborne illness using good cleanliness and food safety practices will be possible.

But first, it will appear fine but might not be alive and well. When something is bad, the organisms lose their activity and eventually die. Thus, old yeast will require more time to rise. The yeast freshness test described below is the best method for determining whether yeast has gone rotten.

  • Dissolve In a measuring cup that holds one cup or more, mix one teaspoon of granulated sugar with half a cup of warm (110°–115°F) tap water.
  • If you don’t have a thermometer, ensure the tap water is warm to the touch rather than hot. Cooler water cannot activate the yeast, and water that is hotter than 120°F will kill the yeast.
  • A yeast packet or 2-1/4 teaspoons of dry yeast should be mixed until dissolved.
  • Keep waiting; it should activate in a minute and climb to the 1-cup level in 10 minutes.
  • Use your test immediately in your recipe, keeping in mind to exclude 1/2 cup liquid; alternatively, if it did not rise, your yeast has gone bad and needs to be thrown away.
  • Some health risks associated with spoiled food exist, so always remember to practice food safety and eat your food before its expiration date.

What are the Risks of Eating Bad Yeast?

The majority of the time, eating outdated yeast won’t hurt you. This is because, despite what many believe, the date stated on the label does not indicate when the goods will expire. It specifies the point at which the product will start to degrade and lose its leavening ability.

Therefore, the worst that can occur is that the baked goods won’t rise, but you won’t get sick from consuming yeast-based foods. The situation might be different if the yeast is moldy or has a bad flavor or smell.

Such yeast might be dangerous to consume, resulting in food poisoning and various digestive diseases. Consult a doctor if you develop stomach pain that lasts more than two days, heartburn, nausea, or diarrhea.

Does Yeast Include Bacteria?

Bacteria are not eukaryotic, unlike yeast. They, therefore, fall under the fungal category rather than the bacteria category and cannot be categorized as bacteria. Unlike mushrooms, which are fungi, yeast only produces one cell at a time. Each yeast organism, or colony, consists of many cells despite having only one cell.


Our data is based on various studies from the US Department of Agriculture and the US Food and Drug Administration to determine how long yeast lasts. Additionally, we searched the internet for publications and papers that provided useful information about food storage, food safety, and yeast shelf life.

Please eat sensibly; although Eat By Date’s information on yeast shelf life is typically trustworthy, keep in mind that individual circumstances will vary. Our advice should only be regarded as an opinion and should not serve as a substitute for the advice of your healthcare expert.