How can preserved eggs and popcorn contain lead?

Problem description:

Very strange! ! !

Analysis:

Lead-containing foods are mainly popcorn and preserved eggs. Lead is a big killer of brain cells. Excessive lead content in food will damage the brain and cause mental retardation. Some children often eat popcorn because in the process of making popcorn, after the machine can is heated by high pressure, part of the lead on the surface of the soft lead pad in the inner layer of the can cover will become gaseous lead. In the process of making preserved eggs, raw materials contain lead oxide and lead salt. Lead has a strong penetrating power, and eating too many preserved eggs will also affect intelligence. Pregnant women drink too much beer, and the lead in the liquid will reach the fetal brain through the placenta, which will damage intelligence.

There are many reasons for lead poisoning. Dr. Ren said that there are many reasons for lead poisoning, such as eating food containing lead, such as preserved eggs, popcorn, canned lead solder, and fruit skins. Frequent contact with color-coded food packaging, paint, lead-containing cosmetics, hair dyes, clothes contaminated with lead, automobile exhaust and lead-containing drugs; Light candles containing lead, especially scented candles and slow-burning candles. Among them, for adults who have little contact with lead, the use of unqualified colored glazed tableware may be an important reason for the excessive lead content in the body. According to reports, heavy metals such as lead and cadmium in unqualified porcelain are easily dissolved from the beautiful glaze, causing chronic harm to human health. Ceramic tableware is usually decorated with glaze, which contains heavy metals such as lead and cadmium. When it comes to acidic food, poor quality products will have excessive lead and cadmium dissolved in the food. If people eat foods with high lead content and cadmium content for a long time, it will lead to the deposition of lead in the blood, leading to the damage of the central nervous system of organs such as the brain and kidneys. In-glaze and under-glaze colored ceramics with smooth surfaces like glass have little or no lead and cadmium dissolution, so you can buy them with confidence. For glazed products with uneven surface, try to choose products with less decorative patterns on the surface. For those products that are not at ease, you can soak them in vinegar for several hours. If there are obvious color changes, they should be discarded.

To prevent lead poisoning in many ways, we should start with diet, living habits and other aspects. First of all, printed materials such as newspapers should not be used as food packaging in the diet. When food is packed in food bags, direct contact with food, especially acidic food, should be avoided. Wash vegetables and fruits before eating, and peel them as much as possible to prevent pesticide residues of lead. In terms of living, try not to use lead-containing paint to decorate the walls, floors and furniture at home, otherwise once the paint crumbs peel off, the lead in the paint will easily cause lead pollution in the living room. Try to use lead-free cosmetics, hair dyes, etc. In addition, don't walk near roads with many cars, because automobile exhaust and soil around roads contain a lot of lead. Diet should contain enough high-quality protein, such as eggs, lean meat, poultry, fish and shrimp, soybeans, bean products, etc., accounting for more than 1/2. Foods rich in vitamins, especially vitamin C, should be selected in dietary distribution. Appropriate vitamin C supplementation can not only make up for the consumption of vitamin C by lead, but also slow down the symptoms of lead poisoning. Vitamin C can also combine with lead in the intestine to form lead ascorbate with low solubility, which reduces the absorption of lead. At the same time, vitamin C also directly or indirectly participates in the detoxification process and promotes the discharge of lead. Appropriate vitamin E supplementation can resist the peroxide reaction caused by lead, while vitamin D supplementation can affect the absorption and deposition of lead by regulating calcium and phosphorus. Supplementing vitamins b 1, b2, b6, b 12 and folic acid can also improve symptoms and promote the recovery of physiological functions.

Eat some lead-free food properly. Many natural foods have certain functions of preventing and expelling lead. Protein contained in milk can combine with lead to form insoluble matter, and calcium contained in milk can prevent the absorption of lead. Tannic acid in tea can form a soluble complex with lead, which is excreted with urine. Iodine and alginic acid in kelp can promote the discharge of lead. Sulfide in garlic and onion can dissolve the toxic effect of lead. Seabuckthorn and kiwifruit are rich in vitamin C, which can prevent the absorption of lead and reduce lead toxicity. Food contains some inorganic anions or acid radicals, such as iodine ions, phosphate ions and molybdate ions. , can combine with lead to promote its excretion from the stool. These nutrients are rich in fruits and vegetables, so people exposed to lead should eat more fruits and vegetables.