Canned food consumption tips: canned products are not eaten Once you can't finish eating, you should keep them properly

The global spread of COVID-19 has had a major impact on people's lifestyles, eating and other habits, and consumption habits have changed accordingly. The consumption concept of food purchases has also changed: awareness of nutrition and health has increased. Canned food is favored by many consumers for its storage resistance. Recently, the China Canned Food Industry Association issued a canned food consumption tip to let the people correctly understand canned food and rationally consume canned food.

The China Canning Industry Association pointed out that canned food refers to food that meets the requirements of raw materials that are processed, canned, sealed, sterilized, cooled, or sterile, and meet the requirements of commercial sterility, without the addition of preservatives can be stored at room temperature for a long time.

(Courtesy of China Canning Industry Association)

First, canned food without the addition of preservatives, you can achieve a long shelf life

Canned food can achieve long-term preservation, mainly relying on the realization of canning processing technology. There are three key points: (1) heating exhaust, vacuuming or filling nitrogen, nitrogen and carbon dioxide gas mixture, etc., greatly reducing the content of oxygen in food and containers, so that the potential microbial growth in the container is in a stagnant state; (2) tightly sealed, blocking the air outside the container (oxygen) or the passage of microorganisms into the container; (3) thermal sterilization, so that the potential microorganisms in the container die due to heat treatment, physical action or chemical action.

Canned food is guaranteed safety by sterilization and sealing. Raw materials through high temperature sterilization, to the maximum extent to kill the microorganisms in the tank, to meet the requirements of commercial sterility, in addition to the packaging material is usually used tinplate and other packaging is very good isolation of external air and moisture, can ensure the stability of product quality for a long time. Therefore, products produced in strict accordance with the canning processing process can achieve a long shelf life of the product without the addition of preservatives.

Second, the five points of canned food packaging containers

Due to the particularity of the canning processing process, canned food has very high requirements for product packaging containers, and must meet the following five element conditions:

(1) Canned containers must be non-toxic: Since the canned containers are in direct contact with food, they must be non-toxic to ensure food safety.

(2) Good sealing: microorganisms are the main reason for food spoilage, as a food preservation container, it must have reliable sealing performance, so that food sterilization is no longer caused by external microbial contamination and deterioration.

(3) Has good corrosion resistance: because the canned food has certain nutrients, salts, organic substances, etc., it is easy to decompose in the process of high temperature sterilization, thereby exacerbating the corrosion of the container, in order to ensure that the food can be stored for a long time, the container must have good corrosion resistance.

(4) Carrying and using: it should have a certain strength and be easy to transport.

(5) Suitable for industrial production: In order to improve production efficiency, reduce costs and stabilize quality, canned food should be able to withstand various mechanical processing in the production process, and adapt to the requirements of factory mechanization and automated production.

Third, the purchase of canned food should pay attention to product packaging and observe the product form

Because canned food has metal packaging, glass bottle packaging, flexible packaging and other packaging forms, and a variety of types, so in the purchase of canned food from the appearance, packaging, sensory quality, label, brand and other aspects to judge the quality of canned food quality. The normal metal can should be complete in shape, not deformed, not damaged, no rust point, and the bottom cover should be concave inward; the center of the metal cap of the glass bottle can should be slightly downward concave, and the contents of the bottle should be complete, the soup should be clear, and there is no impurity. On the contrary, it is not suitable for purchase.

In addition, 1, the expansion of the product should not be eaten: the expansion of the tank refers to the phenomenon of expansion and bulge at the bottom and top of the tin can, which is one of the manifestations of the deterioration of the can. The reason for the expansion of the can is that the sterilization of the can is incomplete, and the food inside is contaminated by microorganisms. Microorganisms multiply from the food in the tank as nutrients and produce gas. The gas gathers to a certain extent to form a deformation of the can.

2, gas leakage mold products do not eat: canned products in the storage and transportation process due to improper handling, bumping and other reasons will cause product packaging deformation, can lid seal leakage, air leakage caused by the product in the can and outside air contact, microorganisms began to multiply, generally in the product after opening the lid will find mold phenomenon.

Fourth, if the canned food that has been opened can not be eaten at one time, it should be properly stored

After the can of meat is opened, if it cannot be eaten at one time and the remaining cans are not stored correctly, it will cause a large number of microorganisms to multiply and cause the cans to deteriorate. Once the cans of fruits and vegetables are opened, if the tinplate material is used, the tinplate is easy to oxidize after encountering air, which will destroy the vitamin C in the food.

Therefore, once the canned meat or fruits and vegetables are opened, if they cannot be eaten at one time, the remaining canned food should be poured into enamel, ceramic or plastic food containers, sealed with plastic wrap for temporary storage, or stored in the refrigerator, but need to be eaten as soon as possible.

Sugar sauce and jam cans can not be eaten at one time, you should cover the mouth of the can or pour into other containers, sealed with plastic wrap, and eaten in 2 days to 3 days (autumn and winter can be stored for a few days), because the sugar content of such cans is generally 40% to 65%, with antiseptic effect, not easy to deteriorate. When such cans are stored, the cans can be covered and ensured to be sealed as much as possible, or poured into other lidded containers and stored in the refrigerator and refrigerated room, but should not be stored for a long time.

The China Canned Food Industry Association reminds that residents must first have a plan to buy canned food, make different choices according to different regions and different family conditions, and cannot blindly purchase. In addition, it is also necessary to pay attention to nutritional mixing and achieve nutritional balance.

Introduction to the types of canned food:

1. Canned meat

Lunch meat is widely used, breakfast: lunch meat sandwich / grab cake / egg cake, lunch & dinner: lunch meat fried rice / fried noodles / fried cake; can be used with Chinese hot pot, Japanese rice balls, European salad, and Italian pizza, can be described as across the East and west, popular all over the world.

Lunch meat meat is delicate, tender taste, flavor is fragrant, the main nutritional components are protein, fat, carbohydrates, niacin, etc., the content of mineral sodium and potassium is high, there is a higher effect of improving immunity, appetizing and digesting. In addition, braised beef, braised pork and canned sheep scorpion hot pot can also be purchased according to personal preferences.

2. Canned vegetables

Canned vegetable food is processed from fresh and good quality raw materials, which basically retains the original nutrients of its own high-quality part, although vitamin C is slightly lost, the proportion of nutrients contained in the unit quality has been improved, which is more conducive to digestion and absorption. Canned vegetables include: canned asparagus, canned tomato sauce, canned mushrooms, canned bamboo shoots and canned cucumbers.

The mainland is a major producer and exporter of canned asparagus. Asparagus enjoys the reputation of "king of vegetables" in the world, rich in a variety of amino acids, proteins, and vitamins, which can improve the body's immunity, and has a strong inhibitory effect and pharmacological effect on the prevention and treatment of hypertension, heart disease, edema and other diseases.

Lycopene in tomatoes has biological effects such as antioxidants, reducing the risk of cardiovascular disease, inhibiting tumorigenesis and development. The relevant research results show that the processed tomato has better nutritional value than fresh tomato, and the tomato sauce is concentrated, the lycopene content is higher, and it is easier for the human body to absorb lycopene after heating.

Edible mushroom canned food is rich in nutrition, delicious taste, with high protein, low fat characteristics, has always been known as "plant meat". Mushrooms also contain iron, calcium, crude fiber, and 19 amino acids, eight of which are essential amino acids. Modern medicine shows that mushrooms contain a variety of antiviral components, which can inhibit the occurrence and development of tumors, reduce certain cholesterol, reduce blood pressure, etc., and have high nutritional value.

3. Canned fruit

Fresh fruit processing into canned, through scientific and reasonable process technology, as long as the cap is tight, proper storage, in the shelf life indicated by the product, can be stored for 24 months or more.

4. Canned aquatic products

The most common canned aquatic products in mainland supermarkets are canned tuna soaked in different soups, accompanied by various flavors of canned tuna, and canned tempeh mud carp that has inherited the history of Southern Guangdong after centuries of reform. It can be eaten directly and can also be cooked with other vegetable ingredients. Fresh mackerel is not easy to preserve, it rots when it comes out of the water, and it is common to process it into cans, and common flavors include brine, oil immersion and eggplant sauce. In addition, there are seafood delicacies such as soft and tender sea cucumbers and nutritious and tender abalone.

5. Canned porridge

Canned porridge has a rich variety and a long history, of which the canned eight treasure porridge is based on a variety of grains and grains as the main raw material, rich in nutrients, moderate sweetness, easy to digest and absorb. Since the development of canned porridge, many flavors have been developed, such as meat porridge, fruit porridge, vegetable porridge, and skin and beauty porridge.

6. Canned dishes

Poor cooking or too lazy to stir-fry, you can also order canned dishes without ordering takeaway. In recent years, there are many kinds of canned dishes, including fish and meat shreds, kung pao chicken, mapo tofu, curry potatoes, etc., which can be eaten simply by heating home, and canned self-heating dishes are now more convenient for heating processing.

7. Canned grains

Miscellaneous grains are rich in nutrients, but because most of the grains are palatial and digestible, it is not easy to cause people's appetite, if the grains are made into fine canned grains will be able to obtain higher sensory evaluation, and convenient to eat. Among the more popular canned grains is canned corn.

8. Other canned food

In recent years, there is a food in the health market that is highly sought after - canned bird's nest. Only bird's nest, water, rock sugar are added, and the advanced canning process is adopted to provide consumers with more convenient, time-saving and durable beauty tonics.

9. Canned pets

Don't forget to prepare delicious rations for "hairy children" at home, prepare some pet canned food, meet the daily needs of cats, cats, dogs and dogs at home, and the nutritional combination of pet canned food is also very comprehensive.