A The shelf life of food This is a slightly more difficult problem than it seems. Not because it is difficult, but because it is not a question of white or blacks, but taking into account all gray tones. For example, almost everyone knows, since this is not the same best before date What Preferred consumptionThe field but even taking this into account, more precisely, are the numbers? Are there any products that do not expire?
The source of food is understood as a date until it can be safely consumed. After this day, the consumer cannot be guaranteed that the consumption of the product will not produce a single discomfort or lack of food securityA field with a preference for consumption refers to the date when the product Loses quality. Some of its organoleptic properties can be changed, so it is recommended to take it earlier.
But there is even more diffuse line. And is there a time when these products also cease to be safe? Is there a validity period after preferred consumption? It is often said that products that contain living microorganisms, such as yogurt or cheese, do not expire; Because, in the end, they already have Microorganisms which may encounter those who proliferate other methods. This has some evidence, but it is not so simple.
Why the expiration of the diet?
As a rule, the expiration of the diet is associated with Proliferation of microorganisms Pathogens, such as bacteria, fungi or viruses.
Products that have not been processed and can, of course, carry some microorganisms are the simplest expired. For example, a case Raw meat or salad bags.
To understand what it means to process food, we can think about packaged gaspacho. The bottle of Gazpacho Not pasteurized Usually he has very little space for consumption, with the date of expiration a few days after his arrival in supermarkets. Instead, those who are pasteurized, which are usually sold in tetrabrics, serve much larger. In fact, they last longer in the container and are once open. Gazpacho without pasteurizar should be used in the maximum in accordance with 24 hours after the openingIn the same way as if we were preparing it at home. Instead, pasteurized sometimes can last up to a week without damage. This, logically, will be carried out whenever the tag conditions are preserved. For example, if you do not remain chilled, bacteria can proliferate much faster. Because, in the end, they almost always proliferate.
The outflow of the diet also depends on your Water contentThe field of most microorganisms that proliferate food need moisture to feel comfortable. For this reason, dry food, such as rice or a calm pasta, never deteriorated. Although they can attract insects or lose some of their properties.
It is important to insist that we refer to Paste and rice without cooking. After cooking, they should be consumed in a maximum of 24 hours, since even chilled are the perfect place for reproduction for rather dangerous microorganisms, such as bacteria Bacillus cereus.
It is also important to emphasize that integral rice can be spoiled, since while maintaining bran, it contains natural oils that it places, and those that can be rooted or even contribute to the fact that some proliferating microorganisms.
Is there a validity period after preferred consumption?
There are products that will never be a problem for our safety if we save them well. Others, on the other hand, can expire for a long time from preferred consumption.
For example, a case yogurts The date of expiration of these products does not exist as such. What is indicated in the container is Preferred consumption. However, after a while they cease to be safe.
Yogurts are preparing Pasteurized milk. This means that in the ideal world the product that we consume does not contain more microorganisms than useful Dairy bacteriaNevertheless, it can happen that a very low amount of microorganisms penetrates into yogurt during Processing or packaging. This is the minimum amount. There are not enough monoculants to get sick. But these bacteria, mushrooms or microorganism, which can multiply if time passes enough.
On the other hand, we must keep in mind that, just carrying yogurts at the house of a supermarket, we already break a cold chain for a moment, giving pathogenic bacteria the possibility of a slightly closer to this infectious monk.
In any case, according to the Spanish Academy of Nutrition and dietetics, we can safely use yogurt during 30 days After preferred consumption, provided that it is preserved properly.
The validity of some products does not exist
Ultimately, yogurts expire, but it is true that there are products that can remain in our pantry for many years, without creating any problems if we consume them.
For example, a case Honey. It contains a large amount of sugars, but at the same time it is very acidic food and hardly with humidity, so it is an absolutely exalting environment for pathogenic microorganisms. Of course you should be careful with disputes Clostridium Botulinumwhich can remain in honey and call botulism Children. That is why it is not recommended to eat honey up to a year.
Just as honey repels pathogenic microorganisms to obtain many sugars, Dining sugar It never expires. The same thing happens with salt. If bacteria or some other similar microorganism came into contact with salt, they found that there are a much smaller amount of salts inside in the cage. What, by Osmotic balanceGive a lot of salt outside to try to match the concentration inside and outside. The result is the death of the cells of the cells of these microorganisms, usually unicellular. That is why both salt were used in ancient times to save food.
Finally High alcohol And they do not expire. We already know that alcohol is used as a disinfectant, so it is logical that microorganisms cannot plow in it.
In short, are there any products that do not expire? The truth is that. But we cannot be sure that, for example, not to walk in the amount of mycotoxins or insects, which can also transmit diseases. The more time the food spends on our toxin, the more possible it is possible. Follow this too.
Source: Hiper Textual
