The refrigerator is the main assistant in preserving food freshness, but not everything can and should be kept there. Errors in storage lead to loss of taste, accelerated spoilage and even formation of dangerous bacteria. For example, tomatoes in the refrigerator become mealy, and bread goes stale 2 times faster. But this is just the tip of the iceberg.
In this article we will look at why some foods spoil at low temperatures, and also tell you about non-food items that absolutely cannot be kept near food. You will learn how to properly organize the refrigerator space to extend the shelf life of food and avoid poisoning. And at the end - scientific reasons, why some foods spoil at low temperatures, and we will also tell you about non-food items that absolutely cannot be kept near food. You will learn how to properly organize the refrigerator space to extend the shelf life of food and avoid poisoning. And at the end - table with optimal storage conditions for the most problematic categories.
We bet at least 3 items from this list will surprise you? Test yourself!
Why some foods cannot be stored in the refrigerator: scientific explanation
The main function of the refrigerator is to slow down the growth of bacteria and fungi due to low temperatures (usually +2...+5°C). However, for some products this becomes a problem:
- 🍅 Tropical fruits and vegetables (bananas, pineapples, mangoes) contain starch, which at +5°C begins to break down into sugars unnaturally quickly. The result is a loss of texture and the appearance of dark spots.
- 🥖 Bread products in the refrigerator lose moisture 3-4 times faster due to the temperature difference between the product and the air. This is called starch retrogradation.
- ☕ Coffee and spices absorb foreign odors through microscopic pores in the packaging, and condensation accelerates the oxidation of the oils in their composition.
- 🧅 Onions and garlic at +4°C they begin to sprout and rot due to disruption of the natural dormancy cycle.
In addition, the refrigerator creates excess humidity (60–80%), which is destructive for products that need a dry environment: nuts, dried fruits, sweets. And frequent temperature changes when opening the door accelerate the deterioration of even those products that can be are stored in the cold, but not on the door (for example, milk or eggs).
⚠️ Attention: If your refrigerator is equipped zone 0°C (for example, BioFresh in models Liebherr or FreshZone in Samsung), storage rules may differ. In such compartments it is permissible to keep some of the “forbidden” products (for example, tomatoes or peppers), but no longer than 3–5 days.
Top 7 products that spoil in the refrigerator faster than at room temperature
These products not only lose their taste, but can also become dangerous due to development Clostridium botulinum (causative agent of botulism) or Listeria monocytogenes (leads to listeriosis).
| Product | What happens in the refrigerator | How to store correctly |
|---|---|---|
| 🍌 Bananas | The peel turns black due to cell destruction, the flesh becomes mushy | At +18–22°C in a suspended state (without contact with other fruits) |
| 🍅 Tomatoes | The pulp becomes mealy, up to 60% of aromatic substances are lost | At +15–20°C in a dark place (not in the sun) |
| 🧀 Hard cheeses (Parmesan, Pecorino) | Mold develops 2 times faster due to condensation in the packaging | In cheese paper at +10–12°C or in a special container with ventilation |
| 🥑 Avocado | Does not ripen, the pulp becomes bitter due to the stoppage of enzymatic processes | At +20°C until ripening, then in the refrigerator for no more than 2 days |
| 🍯 Honey | Crystallizes, loses antibacterial properties | In an airtight container at +5–25°C (preferably in cabinet) |
Critical fact: Storing potatoes in the refrigerator leads to the conversion of starch into sugars, and when fried, such potatoes release acrylamide a carcinogen classified by WHO as "probably carcinogenic to humans" (Group 2A).
Non-food items that cannot be kept in the refrigerator
The refrigerator is not a universal storage. In addition to food, there are often things that spoil the microclimate, contaminate food, or even pose a danger (except for those that require storage at +2–8°C). Most tablets and ointments lose effectiveness due to humidity. For example, aspirin in the refrigerator begins to break down into salicylic acid and vinegar.
- 💊 Medicines (except for those that require storage at +2–8°C). Most tablets and ointments lose effectiveness due to humidity. For example, aspirin in the refrigerator begins to break down into salicylic acid and vinegar.
- 📄 Documents and photographs. The paper absorbs odors and turns yellow due to condensation. Old photographs may stick together irrevocably.
- 🔋 Batteries and accumulators. Low temperatures reduce the capacity of lithium batteries by 20–30%. And alkaline batteries (Duracell, Energizer) can leak.
- 🧴 Oil-based cosmetics (creams, balms). Oils separate and preservatives lose their activity. An exception is heat-labile serums (check on the packaging).
- 🎨 Art materials. Watercolor paints (Winsor & Newton) freeze and crack, and gouache becomes lumpy.
They are particularly dangerous aerosols (hairspray, deodorants). At low temperatures, the pressure in the cylinder drops, and when heated (for example, if the cylinder is taken into the room), it can explode. Manufacturers Oriflame and Nivea directly indicate on the packaging: “Do not store at temperatures below +5°C.”
⚠️ Attention: If your refrigerator has a function Super Cooling (quick cooling), never Place electronics or optical media (DVD, CD) in it. A sharp temperature change leads to the formation of microcracks.
Dangerous combinations: what cannot be stored nearby in the refrigerator
Even products approved for storage can spoil due to improper proximity. Here are the riskiest combinations:
- 🧄 Garlic + milk. Garlic releases allicin, which penetrates through plastic packaging and gives milk a bitter taste.
- 🍎 Apples + carrots. Apples emit ethylene, which makes carrots bitter and soft.
- 🐟 Fish + fruit. Fish absorbs sugars from fruits, which accelerates the growth of bacteria Vibrio parahaemolyticus (leads to acute intestinal infections).
- 🧀 Cheeses + citrus fruits. Acids from lemons/oranges destroy milk fats, and the cheese begins to “cry” (release liquid).
To avoid cross-contamination, use sealed containers (for example, Lock&Lock or Tupperware) and place products in zones:
Top shelves (+2–4°C) - dairy products, eggs, ready meals
Middle shelves (+3–5°C) - cheeses, sausages, sauces
Lower shelves (+1–3°C) - meat, fish, seafood
Door (warmest place) - only drinks and spices in sealed containers
Fruit/vegetable drawers - only those that like moisture (cucumbers, lettuce, berries)-->
If your refrigerator has a function Air Flow (even air distribution), the risk of cross-contamination is reduced, but does not disappear completely. Models Bosch Serie 8 and LG InstaView have separate compartments for this purpose with individual humidity control.
How to properly store “forbidden” foods without a refrigerator
Giving up the refrigerator does not mean leaving food to rot on the table. Here are proven ways to prolong freshness:
For fruits and vegetables:
- 🍎 Apples: store in paper bags in a cool cellar or on an insulated balcony (at +10–15°C). One rotten apple infects neighboring ones in 2-3 days.
- 🍌 Bananas: wrap the tails with cling film - this will slow down the release of ethylene.
- 🥕 Carrots, celery: place in a jar of water (like bouquet) and change the water every 2 days.
For bread and pastries:
- 🥖 Bread: keep in a ceramic or wooden breadbox. Plastic bread bins accelerate the appearance of mold.
- 🍞 Crusks, cookies: in metal cans with silica gel bags (absorb moisture).
For spices and bulk:
- ☕ Coffee: in vacuum packaging in a closet (not exposed to light!). After opening, pour into a jar with a valve (OXO Good Grips).
- 🌶️ Spices: in glass jars away from the stove. Direct sunlight destroys essential oils.
Professional life hack: For long-term storage of onions and garlic, use nylon stockings. Place the bulbs in a stocking, tying a knot between each layer, and hang them in a dry place so they are ventilated and do not rot.
Myths about storing in the refrigerator: what can actually be kept in the cold
There is a lot of conflicting advice about what can and cannot be stored in the refrigerator:
- ❄️ "Chocolate in the refrigerator becomes covered with a white coating" - true, but only if you store it without packaging. In an airtight container at +10–12°C, chocolate can be stored for up to 1 year.
- 🥚 "Eggs cannot be washed before storage" is incorrect. In the USA and the EU, eggs are washed and stored in the refrigerator (as required by law), but in Russia they are sold. dirty. Washed eggs are stored at +4°C for up to 30 days, dumb - up to 25 days at +20°C.
- 🍋 "Citrus fruits lose vitamin C in the refrigerator" - partially true. Vitamin C is destroyed by 10-15% per month, but at room temperature the loss reaches 30% in the same week.
- 🧈 "Butter spoils without refrigerator" —depends on the type. Ghee (ghee) is stored at +25°C for up to 6 months, and regular butter - no more than 3 days.
Another common myth: "Cucumber becomes slimy in the refrigerator". In fact, the slimy texture appears due to ethylene released by neighboring products (tomatoes, apples). If you store cucumbers separately in a container with a paper towel, they will remain crispy 5-7 days.
Why do they store eggs in the refrigerator in the USA, but not in Europe?
In the USA, eggs are treated with a special disinfection solution, which washes off the natural protective film (cuticle). Without it, eggs must be stored at +4°C. In Europe, the cuticle is not washed off, so eggs can be kept at room temperature for up to 21 days.
What to do if you have already stored prohibited foods in the refrigerator
If you find that you have stored bananas, tomatoes or bread in the refrigerator, do not panic. Assess their condition using these signs:
| Product | Signs of spoilage | Is it possible to eat | What to do |
|---|---|---|---|
| Bananas | The peel has turned black, the flesh has become liquid | Yes, if there is no mold | Use in baking (banana bread) |
| Tomatoes | The pulp is mealy, the skin is wrinkled | Yes, but the taste will be worse | Make sauce or soup |
| Bread | Mold, musty smell | No | Throw away, rinse the refrigerator with soda solution |
| Avocado | The pulp is gray or with black veins | No | Throw away (signs of fat oxidation) |
| Honey | Strong crystallization, sour smell | Yes, after heating | Melt in a water bath (not higher than +40°C) |
If the product is smells of mold, acid or chemicalsit must be thrown away - even after heat treatment, toxins can preserved. After removing spoiled products:
- Rinse the shelves and containers with a solution of vinegar (1:1 with water).
- Wipe the rubber seals with soda - this is where most bacteria accumulate.
- Place an open box of soda in the refrigerator - it will absorb extraneous odors.
- Set the temperature: +4°C for the main chamber, -18°C for the freezer.
⚠️ Attention: If a persistent smell of fish, ammonia or rotten eggs appears in the refrigerator, this may indicate a freon leak (in models with system No Frost) or compressor malfunction. Immediately disconnect the device from the network and call a technician.
FAQ: Frequently asked questions about storing food
Is it possible to store garlic and onions in the refrigerator if they are previously peel?
Peeled garlic can be stored in the refrigerator for no more than 3-4 days in an airtight container, but it will lose up to 40% of its aromatic substances. Onions after peeling are stored even worse - they become slimy and bitter after 2 days. It is better to peel them immediately before use.
Why do restaurants store tomatoes in the refrigerator, if this is the case? harmful?
In professional kitchens they use refrigerators with a zone +8...+10°C and high humidity (85–90%), where tomatoes are stored for up to 5 days without loss of quality. In household refrigerators, this regime cannot be maintained. In addition, restaurants often use special varieties of tomatoes (for example, Roma or San Marzano), which are less sensitive to cold.
Is it possible to freeze foods that cannot be stored in the refrigerator (bananas, avocados)?
Yes, but with reservations:
- Bananas are frozen peeled for smoothies (they turn black, but retain their taste).
- Avocados are frozen only in the form of puree with lemon juice (the whole pulp becomes watery).
- Tomatoes are frozen for sauces, but after defrosting they are unsuitable for salads.
The freezing temperature should not be higher -18°C.
How to store opened canned food (tuna, corn) after opening?
Place the contents in a glass or ceramic container with a lid. Metal cans oxidize and give the product a metallic taste:
- Canned fish - up to 2. days.
- Vegetables (corn, peas) - up to 3 days.
- Fruit compotes - up to 5 days.
If a film or bubbles appear on the surface, the product is spoiled.
Is it true that in refrigerators with a system No Frost products last longer?
The system No Frost prevents the formation of ice, but does not affect the shelf life of products. The main advantage is uniform temperature and no need to defrost the refrigerator. However, due to constant air circulation, products may dry out faster. To avoid this, use containers with lids or cling film.