We generally like to eat fresh food, which not only tastes good, but also has high nutritional value. But is everything like this? These six kinds of food are unexpected. The fresher they are, the more poisonous they are! Let's get to know them together!
fresh milk
It is reported that farmers in a city are selling cows on the street as they are sold, which is very popular with the public. However, Jia Jianbin pointed out that this approach is not desirable. Because the extruded milk with bacteria, such as Brucella, Mycobacterium tuberculosis, easy to cause zoonotic infectious diseases. In addition, this kind of 'fresh milk' can not guarantee the environmental hygiene of milking, the disinfection of containers and the health status of milkers. Therefore, it is safer for consumers to go to the supermarket to buy milk produced by regular manufacturers.
Fresh tea
The so-called new tea is less than a month after picking, such as the spring tea of the season. Wang Yi told reporters that the newly picked spring tea contains tannins, alkaloids and other substances with strong activity. If you drink a large amount of them, it can make people's nervous system extremely excited. It seems that the blood circulation is accelerated and the heart rate is accelerated, making people feel flustered. Therefore, should pay attention to drink new tea should not be too thick, excessive, it is best to place for a period of time, wait for the polyphenols in tea after partial oxidation.
Fresh day lily
Jia Jianbin suggested that fresh day lily should be avoided as far as possible. Fresh daylily contains colchicine, which can be absorbed in the gut and then turned into toxic substances in the body, causing poisoning. In contrast, dried day lily in the production process after steam fumigation, drying and other processes, can remove most of the colchicine, more safe. Colchicine is soluble in water, therefore, if you eat fresh day lily, you must first go through blanching, soaking and other processes, dry day lily had better be soaked before eating.
Fresh agaric
Wang Yi pointed out that dried Auricularia auricula is safer than fresh Auricularia auricula. Because fresh Auricularia contains a special component, the chemical name 'porphyrin'. Porphyrin is a kind of light sensitive substance. After people eat fresh Auricularia auricula, the sun irradiation will cause plant solar dermatitis, which can cause skin pruritus, and the exposed part of the skin will be red, swollen and itchy. Dried Auricularia auricula is the finished product after exposure treatment, which will decompose most of the porphyrins in the process of exposure, and soak in water before eating, the remaining toxins will dissolve in water, making the dried Auricularia auricula non-toxic. It should be noted that the water should be changed several times when soaking dry agaric.
Fresh pickles
Fresh vegetables contain a certain amount of nitrate. In the process of salting, it will be reduced to nitrite. After the concentration reaches a peak, nitrite is gradually used or decomposed by bacteria. Nitrite is carcinogenic to some extent. Generally speaking, the most nitrite in pickles occurs between two or three days to more than ten days after pickling. Therefore, pickles should be eaten after 20 days.
Fresh Vegetables
Many people like vegetables and cook them immediately when they come home fresh. Lord & middot; boshville, a professor of food science at the University of Maine, found that the vitamin C content of tomatoes, potatoes and cauliflower decreased after one week's storage, while the vitamin C content of cabbage, melon, green pepper and spinach remained unchanged after one week's storage. Refrigerated cabbages are even richer in vitamin C than fresh cabbages.
In addition, chemical fertilizers and other organic fertilizers are widely used now. In particular, various pesticides are often applied to prevent and control diseases and pests. Sometimes, pesticides are even sprayed on vegetables one or two days before picking. It's better to store slightly when eating, so that the residual harmful substances can be gradually decomposed before eating. For those easily decaying vegetables, they should also be washed several times before eating. We must pay more attention to the food in life must be clean and safe!