There are many spots on the shell of preserved eggs, but are there many heavy metals?

No. How to Choose Preserved Eggs There are lead preserved eggs and lead-free preserved eggs in the market. Consumers should choose lead-free preserved eggs. Because eating preserved eggs containing lead can lead to lead poisoning, which affects hematopoiesis, nerve conduction and cognitive ability, and is prone to dizziness, irritability, inattention, hyperactivity anorexia and mild anemia. How to tell whether preserved eggs contain lead or not? The surface color of shot put ... preserved eggs contain lead. Lead is a toxic heavy metal, which is definitely not good for human body! However, lead-free preserved eggs can be made at home. Harm of lead to human body: 1, extreme neurotoxicity: lead can damage the brain and nerves, making people mentally retarded, unresponsive, hyperactive, inattentive, hearing impaired, learning difficulties and dyskinesia. 2. Quote ... Preserved eggs contain a lot of lead. In September 2008, China revised the lead content standard of preserved eggs, and from the perspective of food quality and safety, the traditional lead-containing processing technology in the original standard of preserved eggs was deleted. The lead content of preserved eggs is strictly regulated in the new standard-no more than 0.5 mg/kg, which is higher than the requirements of the original hygienic standard for egg products. When making preserved eggs, there is an auxiliary material wrapped outside the fresh eggs, and its chemical composition is lead oxide. Adding lead oxide can promote ingredients to penetrate into eggs evenly and quickly, and also can make preserved eggs solidify quickly and shell easily. However, in the process of placing, these lead oxides gradually penetrated into the eggs. Preserved eggs on the market include lead preserved eggs and non-preserved eggs. It mainly contains heavy metals such as lead. Preserved eggs contain more minerals than duck eggs, but the fat and total calories decrease slightly. It can stimulate digestive organs, stimulate appetite, promote digestion and absorption of nutrients, neutralize gastric acid, and reduce temperature and blood pressure. Has the effects of moistening lung, nourishing yin, stopping bleeding, cooling intestine, stopping diarrhea and lowering blood pressure. In addition, preserved eggs can also protect blood vessels. At the same time, there are some improvements ... only laboratory determination methods, no practical methods of sensory discrimination. It is misleading to say that lead-free is only a standard "lead-free process", not completely lead-free. Children had better not eat or eat less! . Preserved eggs are indispensable roles in many home-cooked dishes, such as three-color eggs, preserved egg lean porridge, preserved egg tofu and so on. Without them, the taste is simply gone! Some people may stay away from the taste of preserved eggs, but people who like preserved eggs like its unique flavor very much! Looking at the dark appearance of preserved eggs, people can't help wondering: this is processed and pickled ... yes, preserved eggs will produce lead when they are made. Eating too much is not good. Eating it occasionally won't do any harm to your health, but preserved eggs are made of sodium carbonate and sodium hydroxide, so the sodium content is high and it is not suitable for patients with hypertension and kidney disease. Besides, children had better eat less because of chemicals. Moreover, some illegal traders used lead compounds when making preserved eggs, and eating such preserved eggs may lead to chronic lead poisoning. ...