There have been media reports, a couple in the roadside selling Dorayaki, the price is very cheap, sell one yuan / bag, attracted a large number of elderly people come to buy (sell this food in the supermarket to 16 yuan). The reason why so cheap, because they are "temporary period of food." According to the production date and shelf life projections, the night is over at 12:00, on these Dorayaki become expired food. Therefore, when law enforcement officers on patrol through the stalls of this banned. Typically, Advent food in the supermarket shelves would generally one month in advance.
Shelf life can be said that is accompanied by the food industry and food distribution generated. Food Factory production of food in order to sell to consumers, need to go through storage, transportation, put on store shelves, but also to wait for consumers bought. This time, it is not bad, otherwise the manufacturers would lose everything. So every kind of food research and development will consider the shelf life, including not only the most likely to think everyone spoilage caused by bacteria, including fatty acids defeat rancid flavor, caking, deliquescence, discoloration, crystallization, and other issues.
Of course, when it comes to shelf life it must be mentioned storage conditions, a common example: storage at room temperature, away from light, avoid heat, refrigeration, freezing and so on. If you do not comply with storage conditions, the shelf life of food is likely to shrink, and even loss of security protection. For example, there have been frozen food in the warranty period appears excessive bacteria, mildew, it may be caused by inadequate cold chain food thawed, microorganisms multiply.
How to determine the shelf life of it? Typically by "stability test" to determine. For example, a one-year shelf life of the food, the thermostat can be placed close to the real storage conditions and humidity test box, every once in a while to get out to see how to save a number of effects, including microorganisms, sensory indicators, physical and chemical indicators. If the time is too long, you can use a hot and humid environment as "accelerated test", then calculated using the formula, such as 3 months 1 year simulation. Of course, the results of the test to simulate real conditions more reliable.
After the general market, manufacturers will verify the validity of the shelf life of the shelf according to the actual sampling results and customer complaints and other information. In fact, the shelf life of one year does not mean that food manufacturers to do one year of trial, or just enough shelf life of 1 year. Because in reality food may experience fluctuations in temperature and humidity, illumination changes, bumps and other transportation, so it is necessary to have a safety factor, or the business risk is too big.
Within the shelf life of food is no problem, but expired can eat it? Who did not dare to force you eat of the food, the business is not allowed to sell expired food, but not necessarily eat expired food. Consider also, qualified food shelf life today or tomorrow that they can not eat garbage? Of course, in the end how long can eat expired, which is not a quasi. In fact, quality is no problem as long as you can eat, because in the "pre-packaged food labels General" (GB7718-2004) which also refers to "more than shelf life, within a certain time, the food may still be able to eat." Of course, the new standard to remove this argument, after all, we can not in the standard inside "encouragement" of food eaten.
Since it can eat through the period that the shelf life of what significance? In layman's terms, it is equivalent to the shelf life of food producers to make you a solemn promise: "shelf life of food during broken, count me in." Businesses can not sell expired food, otherwise it is illegal. But if you put yourself to buy a home expired, manufacturers get that issue is irresponsible.
What Advent food is it? In fact, near the shelf life of food businesses generally shelf inventory regularly, find them. Theoretically businesses can sell Advent food, the main means of lowering prices or bundling promotions, and so on the shelf front. There is a supermarket shelves in advance, return to factory. But relatively speaking, I prefer this marketing approach. On the one hand consumers can enjoy real bargains, it also can avoid re-sale after bad food manufacturers to Advent renovation.
In other countries, the Advent food prices or sell directly to charity is common practice in the business, such as in Canada, the United States, Germany has a well-established food relief mechanism to provide basic food security for low-income persons. Foods and flavors of the best, best before or best tasting of saying the United States, Britain, New Zealand, Japan and other countries, had the best food period (less shelf life) to sell at a discount. The overall purpose is to give food to maximize social benefits, but the expired food in foreign countries do not allow to sell, in addition to the destruction, but also for the manufacture of feed, fertilizer.
Overall, I think that Advent food safety is not only edible, but also the gospel of low-income people. But at the beginning of the article that the message in the case should be cautious, temporary flow of food from the supermarket to the street, in essence, supermarket vicarious liability. While vendors and those older consumers appear to be a win-win, but this practice should not be encouraged. Not to mention the difference between a few hours expired food, so you do not need to play it hanging. We should encourage businesses to sell through normal channels openly Advent food.
So when choosing foods, in terms of shelf life needs pay attention to what the problem? Here are a few of my suggestions for your reference:
First, buy food to avoid impulse spending, not because of promotional offers on a range of store goods, like how much a cheap account. If you want early adopters, first try to buy a small package, delicious the next buy a large package. In fact, this is to say myself, my family most of expired food that way. Of course, I will finally "stubborn" to eat them, be human trials prove "expired food you can eat."
Secondly, price promotions and bundling products and pay attention to see shelf life, they are often Advent food. If you intend to buy to eat right away, it might vote for it, very cost-effective.
In addition, food packaging opened, the shelf life of the void, as the bank "from the cabinet shall not be responsible." So eating food after opening the package as soon as possible, eat should also be sealed. If the price is almost, I tend to buy more than a small package instead of buying a big package.
Finally, if you find merchants selling expired food, do not quiet, immediately scan cargo, RETAIN credentials and complaints, to obtain 10 times the compensation.
(Author: Zhong Kai, food safety Dr)
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