First, rootless bean sprouts
It's time to stop sprouting all kinds of bean sprouts in winter, such as bean sprouts, bean sprouts. Especially in the era of lack of materials in winter, sprouted bean sprouts are sweet and tender, and they taste delicious in winter. After stopping hair growth, the proportion of vitamin C in various bean sprouts is ten times higher than that in bean foods, and the nutritional elements have not decreased, but have increased a lot. Although bean sprouts are rich in nutrition, this kind of "rootless bean sprouts" in farmers' market looks thick and watery, which should be paid full attention to. Mainly because of the use of more rootless agents, additives, thickeners, bleaching solutions, preservatives and so on. They don't germinate in the natural state. Eating this kind of bean sprouts often is more harmful to our health, which is also the ingredient with more food hygiene and safety problems in recent years.
Second, tomatoes with green stems
Tomatoes are a kind of family food that many people like, especially in summer. Many people eat tomatoes as fresh fruits, which are sweet and delicious. However, you should pay attention to buying tomatoes in winter. If you encounter tomatoes with blue pink stems, you'd better not buy them. This kind of tomato is not perfect, and there is a certain amount of solanine. Eating too much will cause nausea, vomiting, dizziness and other discomfort, and even poisoning.
Third, sweet potatoes with black spots.
Harvesting sweet potatoes in autumn has become a "hot commodity" in winter farmers' markets. Everyone likes to buy steamed porridge. Some people like to eat it in baked sweet potatoes at home, which is also a good choice. But when you meet sweet potatoes with black spots and black spots on the surface, you must choose carefully. This is also caused by Aspergillus Niger, which can not be destroyed by continuous high temperature, and it is easy to produce several endotoxin such as sweet potato alcohol and sweet potato ketone, which is very harmful to our health.
Fourth, white tremella
Auricularia auricula, also known as "common instant bird's nest", is an edible mushroom food with various nourishing and health-preserving effects. Rich and diverse tremella polysaccharides can improve human immunity. In winter, people love to cook tremella lotus root soup with tremella. The tremella boiled into collagen fiber tastes soft, sweet and pleasant. After free growth, the dried tremella is normally "light yellow" in color and smells faint. I went to the farmer's market to buy tremella, and I met that kind of tremella with strange taste. It is more cost-effective, and most of them are "poisonous tremella" smoked by sulfur.
Five, purple juice boiled seaweed.
Porphyra is a kind of dried seaweed, which contains a lot of carbohydrates and nucleotides and has a natural seafood flavor. In addition, seaweed also contains a lot of amino acids, such as calcium, magnesium, phosphorus, iodine and so on. Therefore, it is delicious after being boiled into bone soup. Porphyra contains a kind of pure natural melanin, namely "phycoerythrin", which is a kind of protein melanin, which makes dried laver look purplish red, and tea soup turns red after soaking in cold water, indicating that laver is relatively fresh. However, when heated, phycoerythrin will be transformed and lose the function of melanin, so this is the reason why our stewed seaweed soup turns from red to green. If the cooked seaweed is still attractive dark purple, especially if the juice is dark purple, it is dyed seaweed, so don't buy it again.
Six, both sides are black fungus.
Auricularia auricula is a kind of edible fungus food with high protein, and it has been one of the "eight treasures of mountains and treasures" since ancient times. It contains a lot of carbohydrates, among which ferrous ions, especially auricularia auricula polysaccharide with rich colors, are pure natural immunomodulators and have many benefits to human health. The normal growth and development of dried auricularia auricula, the front of the leaves is pure white, and the back of the leaves is that pale color, which is also the normal color of dried auricularia auricula. As we all know, the material of auricularia auricula is particularly soft, and a catty can basically be called a big bag. Some unscrupulous businessmen have made a bad idea to add weight to dried auricularia auricula by organic chemical coloring method in order to achieve the purpose of illegal profit. When you meet this kind of black fungus, the front and back of the leaves are black dried fungus, so don't buy it. Most of them are colored and poisonous black fungus.
In the farmer's market, no matter how cheap six kinds of dishes are, insiders will never buy them, and hawker relatives will never buy them.