First of all, let's first understand a problem. Why are fruits so bad?
There are three reasons for this: first, mold rot caused by microbial infestation, second, mechanical damage caused by bumps, and third, frost damage caused by low temperatures. Obviously, if it is a fruit with mechanical damage or frostbite, because the food is not rot, eating will not be harmful to health, but if it is mildew, it means that toxic substances have already been produced and should not be eaten again.
For this type of problem, the "Charisma Science" column of Beijing TV Station once did an experiment specifically for this purpose. The reporter sent three kinds of “bad†fruits to the Beijing Physical and Chemical Analysis Test Center for experiments. Among them, due to biological infestation of moldy and rotten fruit, toxins remained intact in intact parts, and mechanical damage and frostbite did not detect toxins in intact parts.
Are rotten fruits. Why are the results so different? Experts explained that the mechanically damaged fruit was soft, but because of the collision, the cells were damaged and the cytoplasm overflowed. At the same time, due to cell damage, some colorless polyphenols are converted into darker quinones, making the wound appear to have a particular color. If such fruits are eaten within a short time after the collision, such "bad fruits" will not affect our health.
Similarly, frostbite fruit is also damaged because of cells, resulting in the appearance of rotten appearance, but they do not breed bacteria, so the fruit is safe.
If it is a mildewed fruit, it is not suitable for consumption. Fan Zhihong, an associate professor at China Agricultural University, told reporters that people who eat the mycotoxins in rotten fruits may experience dizziness, headaches, nausea, and abdominal distension. They can also be life threatening. A survey by the Chinese Academy of Preventive Medicine also found that the content of patulin in the normal appearance of moldy apples is 10%-50% of the moldy parts, and that of apples in normal parts may be as high as 3mg/kg. This kind of mycotoxin is the most toxic substance in moldy fruits that poses a threat to human health.
Therefore, it is health-impact for some people to eat directly from eating moldy places because the seemingly unperverted, intact flesh is actually infested with bacteria and fungi, but it is invisible to the naked eye. After the fruit rots, microorganisms will produce various harmful substances in the metabolic process, especially the reproduction of fungi will accelerate. Some fungi have a carcinogenic effect and can spread from the decayed part through the juice to the non-corrosive part.
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