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3 types of leftovers produce carcinogens even when stored in the refrigerator

Assoc. Prof. Dr. Nguyen Duy Thinh (former lecturer at Institute of Food and Biotechnology, Hanoi University of Science and Technology) said that refrigerators bring a lot of convenience in daily life. If you want to keep food and drink for a longer time, delicious and fresh, a refrigerator is indispensable. Thinking like that, many people now abuse the refrigerator a lot. Any unused or leftover food and drink should be kept in the refrigerator.

Experts say, this is really wrong. There are many healthy foods that should not be put in the refrigerator. Likewise, not all leftovers should be refrigerated to retain their nutritional value. Many types of leftovers also produce carcinogens even when stored in the refrigerator, not as safe as we think.

3 types of leftovers produce carcinogens even when stored in the refrigerator - Photo 1.

3 types of leftovers produce carcinogens even when refrigerated

1. Stir-fried vegetables, vegetable soup, boiled vegetables

Vegetables are an indispensable part of the daily diet. Many housewives often tend to work more than usual for fear that the whole family will not eat. As a result, at the end of the meal, the fried vegetables, vegetable soup or boiled vegetables… are left over. Many people keep it in the refrigerator to eat at the next meal like many other leftovers.

However, MSc Doan Thi Tuong Vi (Former Head of Nutrition Department, Hospital 198) affirmed that the longer cooked vegetables are stored in the refrigerator, the more dangerous they are. Experts especially emphasize the harmful effects of leftovers stored in the refrigerator overnight.

3 types of leftovers produce carcinogens even when stored in the refrigerator - Photo 2.

Even if they are not rancid and still have a good taste, leftovers left over overnight and used for later meals have the potential to produce carcinogens.

“Green vegetables often have a high nitrate content. When cooked, eaten left over and stored in the refrigerator, especially overnight, it will turn into nitrite. This is an extremely toxic carcinogen,” said Dr. Gia confirmed.

When entering the stomach, nitrite will form N-nitroso. Eating a lot of fried vegetables, boiled vegetables or overnight in the refrigerator in the long term is the cause of esophageal cancer, stomach cancer. Milder, you will often have diseases in the digestive tract such as bowel movements, abdominal pain, gastrointestinal infections …

2. Bone broth

Bone broth is very easy to eat. Whether in summer or winter, this water can be processed into nutritious dishes for the whole family. Many housewives often cook a lot of bone broth, if not used up, then freeze it for later use. It can even be used from month to month.

3 types of leftovers produce carcinogens even when stored in the refrigerator - Photo 3.

However, storing food for too long in the refrigerator in this way is actually not good for health. According to Assoc. Prof. Dr. Nguyen Duy Thinh, the longer you store liquid foods such as bone broth in the refrigerator, the higher the risk of bacterial infection, even though you have carefully frozen them.

Not to mention, the longer it is stored in the refrigerator, the higher the nitrite content in the broth, the greater the risk of cancer. Caused by the salt content, spices are added to the bone broth during the cooking process to make the soup more delicious.

Particularly, leftover soups left overnight in metal pots such as aluminum and stainless steel are also susceptible to leaching toxic substances from metal products into dishes. Using bone broth stored in the refrigerator this way puts you at risk of food poisoning.

3. Seafood

On hot summer days like today, many families like to buy seafood to eat together on weekend evenings. Seafood is rich in calcium, nutritious but only true when processed and eaten. Eating seafood overnight is extremely harmful to health.

3 types of leftovers produce carcinogens even when stored in the refrigerator - Photo 4.

The reason is that seafood left over overnight will produce protein degradation, which is extremely harmful to the liver and kidneys. Not to mention the risk of producing bacteria that cause food poisoning, even if you store it in the refrigerator.

4 ways to avoid getting sick from leftovers stored in the refrigerator

In addition to not leaving leftovers overnight, especially the 3 dishes above, you need to remember some ways to store leftovers in the refrigerator to avoid causing illness:

1. Leftover food should be stored in the refrigerator promptly

Whether it’s winter or summer, you shouldn’t leave leftovers outside for a long time. The longer it is left, the more bacteria reproduce when exposed to the outside air environment.

2. Take out leftovers from crockery and porcelain utensils

Leftover food in pots and pans should be poured into bowls, crockery or porcelain plates to cool completely and then stored in the refrigerator for later use. Crockery and porcelain utensils will preserve cooked food more safely.

You should also use quality food wrap to prevent bacteria from entering as much as possible. Plastic boxes and zip bags can be used, but attention should be paid to quality and reputable products to avoid the risk of plastic contamination of leftovers.

3 types of leftovers produce carcinogens even when stored in the refrigerator - Photo 5.

3. Reheat leftovers before eating

It is always better to eat hot than to eat cold. The advice for you is to reheat leftovers after taking them out of the refrigerator. You can use the microwave, cook on the stove. When heating food, pay attention to peel off the food wrap, cover with crockery material to be safer.

4. Clean the refrigerator regularly

Leftovers or any form of raw food stored in a dirty refrigerator will be harmful to health. Refrigerators that are not cleaned regularly and properly will become a reservoir for bacteria like E.Coli. This is a bacteria that grows even in cold environments.

Therefore, the best way is that you should wash and clean the refrigerator regularly to prevent this cross-contamination.

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