Believe it or not, millions of Americans have used psychedelics like shrooms. Psychedelics also called hallucinogens refer to drugs that alter your perception and all five senses. They can also affect your cognition and your mood. If you’ve ever taken shrooms, you probably already knew that. Shrooms contain psilocybin. Psilocybin is also classified as a hallucinogen and a schedule 1 drug. But what you may not know is whether or not shrooms go bad. Well, we have the answer to this very popular question.

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Can Shrooms Go Bad?

Yes, they do. Just as weed can go bad if it isn’t stored properly, so can magic mushrooms. 

Dr. James Woodford, a forensic chemist, explains to Vice that over time, certain factors will alter the chemical bonds in drugs leading to a loss in potency. 

How Long do Shrooms Last?

According to Psychedelic Experience, fresh mushrooms will last just about a week or two. After that, they’ll go bad. However, dried mushrooms last a lot longer.

Do Dry Shrooms Go Bad?

Dry shrooms have a significantly longer shelf life than fresh ones. Since the moisture is removed from dried mushrooms, bacterial growth is much less likely. If stored properly in and airtight container, magic mushrooms can keep most of their potency for six months to a year. This can even extend beyond a year if stored in the fridge since exposure to heat and air are the main reasons why mushrooms degrade over time.

Are Shrooms Dangerous After They Go Bad? 

Well, Dr. Rick Doblin, a chemist who founded the Multidisciplinary Association for Psychedelic Studies says stale drugs, in general, are usually harmless. Doblin was quoted in Vice saying, “ “Most of the time old drugs just lose their purity. It’s rare that they become dangerous.”

However, this statement wasn’t specific to magic mushrooms, just drugs in general. 

On the other hand, Psychonautix Shrooms Dispensary says that consuming spoilt mushrooms can lead to adverse effects. They mentioned vomiting, diarrhea and possible food poisoning. However, the dispensary and Doblin both agree with the loss of potency.

It should be noted that even perfectly fresh mushrooms could cause adverse reactions. According to Insider, a bad trip can cause many physical ailments. Insider says a bad trip causes, “unpleasant physical symptoms such as nausea, chills, vomiting, or headaches.”

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Signs of Spoiled Shrooms 

There are several signs of spoiled mushrooms. Look out for:

  • Mold Yes fungi can still get moldy. If you see mold on your shrooms, it’s best to just throw them out. 
  • Bad Smell – When things smell bad that’s a telltale sign that they have gone bad. In addition to that Psychedelic Experience mentions that a sweet smell is still not ideal and that the mushroom should be tossed. 
  • Spotted – If your magic mushrooms have white or black spots then it’s time to toss them out.

Fresh vs Dried Mushrooms Potency & Taste

Fresh mushrooms have a significantly better taste than dried. They taste very similarly to your average baby bella mushroom due to the high water content which balances out the bitterness. Dried mushrooms have a notoriously bitter flavor an unpleasant texture. The drying process also makes shrooms slightly less potent due to oxidation.

How to Store Shrooms

Storing shrooms properly will extend their shelf life. Psychedelic Experience suggests storing fresh mushrooms in Tupperware with a paper towel or a paper bag. They also suggested using food vacuum packers to keep them fresh for up to three months. 

Some magic mushroom users prefer to dry them before storing them. That’s because dried shrooms have a longer shelf life than fresh shrooms. According to Psychedelic Experience, mushrooms are dried using food dehydrators, Epsom salt, the oven, or air drying. 

Psychonautix Shrooms Dispensary suggests storing dried shrooms by:

  • Storing in an airtight container – These containers could be Tupperware, another plastic container with a lid, food vacuum packs, or glass containers. They said these containers with tight lids are ideal because they prevent air, moisture, and insects from entering. It should be noted that vacuum sealing is a far superior storage method but it’s more expensive. 
  • Storing with silica gel – The role of silica gel is to prevent moisture from gathering in the container. The dispensary says, “it’s completely practical to put in a couple of bags of silica gel in your preferred containers to help preserve your beloved shrooms”.

How to Dry Shrooms

If you don’t plan on using your shrooms for more than two weeks consider drying them to prolong the shelf life. If you’re wondering how long to dehydrate shrooms, it varies depending on the method you choose. Drying shrooms is a fairly simple process and you can choose between one of the following techniques. Regardless of the option, you’ll know that the shrooms are ready if they snap under pressure.


Using a dehydrator is the fastest, most reliable method as it gently heats shrooms while providing a constant airflow so that they dry out evenly. Set the dehydrator to around 104°F. It normally takes about 4-8 hours depending on how dry they were before putting them in. If you do not have a dehydrator, you can use one of the air drying methods below, although they are much more prone contamination.

Air Dry under the Sun

While this method takes the longest, it’s the easiest. Leave your shrooms outside for roughly 2-3 days on a clean surface under the sun in an area with good airflow. If placed under direct sunlight, they may become fully dried in as little as a day so just check in on them frequently if that’s the case.

Dry with Fan

If you use this method it’s important that the relative humidity of the space is roughly 55% RH so that they can dry optimally. Place your shrooms on a clean surface such as a piece of cardboard, spread out your mushrooms and position the fan so there’s a constant flow of air over the shrooms.


Shrooms can go bad as most things do. They may cause negative effects when ingested. People tend to extend the shelf life of shrooms by proper storage methods but you can also learn how to dry mushrooms if you don’t plan to use them for longer than two weeks. You may still experience negative effects from magic mushrooms if you have a bad trip and not because the mushrooms have gone bad. If you’re experiencing negative effects, it’s a good idea to see a medical professional. 

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