6 Foods That Should Not Be Left Overnight

Updated on February 2, 2015

There are some foods you don’t want to waste, so you decide to save them overnight for use the next day. Be careful! Here's a list of foods you should not keep overnight, as they could be harmful to your health, even if you keep them in the refrigerator.

Food: Safe to Save or Throw Away?

Green Teas

If you leave green tea overnight, it will lose all its protein and vitamins. Dangerously, it produces more bacteria, fungi-breeding nutrients which will harm your health. Don’t drink the previous day's green tea!


Cooked Mushrooms

Mushroom soup is highly nutritious, but twelve hours will reduce the nutrients and produce many harmful components. Cooked mushrooms contain nitrates which are good for red blood cells, but after one night, the nitrates will change into nitrites which are not good for your body.


Not-Fully-Cooked Eggs

If not fully cooked, don't eat eggs left overnight. Egg yolks can easily be contaminated and therefore harmful to health. They can cause gastrointestinal discomfort, flatulence, and other gastrointestinal problems like diarrhea and bloating.

However, if the eggs have been cooked, sealed properly, and kept in the refrigerator, they can generally be stored without problem for 48 hours.


Leafy Green Vegetables

Dark, green leafy vegetables contain lot of nitrates. If cooked and leftover to eat the next day, they promote the decomposition of bacteria and the nitrate will be changed into nitrite, which may increase cancer risk.


Mixed Salads

Mixed salads have many ingredients such as dressing, vinegar, dried fruits, etc. Even if you save it in the refrigerator for the next day, the salad could be prone mold and pose a health risk.



Fish, shellfish, and oysters should not be left overnight if it is steamed or grilled. The next day, fish and seafood are prone to protein degradation and can damage liver and kidney function.


Now you know the list.

Try not to make too much of these foods so you don't have to throw it away!


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    • profile image

      Johne694 3 years ago

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      Johnk0 3 years ago

      Very efficiently written post. It will be valuable to anyone who usess it, as well as myself. Keep doing what you are doing i will definitely read more posts. dgdddddeaedg

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      what 4 years ago

      What kind of propaganda or bull is this? What journal of medicine, Scientific American, or other reputable source is this based from?? Don't even go there if you're thinking 'common knowledge'. If this is so dangerous, why hasn't there been more articles about this, and why do some of the articles only originate from a certain country??

    • profile image

      Sara 4 years ago

      Could you provide where you got the sources from? Thanks.

    • ihealthyliving profile image

      ihealthyliving 6 years ago

      Thanks for bookmarked this hub. I'm glad that you think they are helpful information.

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      Milli 6 years ago from USA

      What an eye opening tips. Thanks for sharing. Bookmarked and voted up!