Lead-containing foods are mainly popcorn and preserved eggs. Lead is a big killer of brain cells. Too high 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, the raw materials contain lead oxide and lead salt. Lead has strong penetrating power, and eating more 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 the intelligence.

There are many reasons for lead poisoning. Dr. Si Liu Ren said that there are many reasons for lead poisoning, such as eating lead-containing foods, such as preserved eggs, popcorn, canned food with lead solder, and fruit skins. Frequent contact with color-printed food packaging, paints, lead-containing cosmetics, hair dyes, clothes contaminated with lead, automobile exhaust and lead-containing drugs; Light candles containing lead, especially scented 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, lead, cadmium and other heavy metals in unqualified porcelain are easily dissolved from the beautiful glaze, causing chronic harm to human health. Ceramic tableware is usually decorated by glazing, which contains heavy metals such as lead and cadmium. When it comes to acidic food, the poor quality products will have excessive lead and cadmium dissolved into the food. If people eat food with high lead and cadmium content for a long time, it will cause lead to deposit in the blood, leading to damage to the central nervous system of the brain and kidneys and other organs. In-glaze and under-glaze colored ceramics with smooth surface like glass, there is little or no dissolution of lead and cadmium, so you can buy them with confidence. For the glazed products with concave-convex surface, products with less decorative patterns on the surface should be selected as far as possible. For those products that are not at ease, they can be soaked in vinegar for several hours. If there is obvious color change, they should be discarded.

To prevent lead poisoning in many ways, we should start with diet, living habits and other aspects. First of all, newspapers and other printed materials should not be used as food packaging in diet. When food is contained in food bags, direct contact with food, especially with acidic food, should be avoided. Vegetables and fruits should be washed before eating, and peeled as much as possible to prevent lead from remaining in pesticides. In terms of living, try not to use lead paint to decorate the walls, floors and furniture in the home, otherwise, once the paint chips 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 where there are many cars, because there is a lot of lead in automobile exhaust and soil around roads. The diet should contain enough high-quality protein, such as eggs, lean meat, poultry, fish and shrimp, soybeans and bean products, which should account for more than 1/2. Foods rich in vitamins, especially vitamin C, should be selected in dietary allocation. Appropriate vitamin C supplementation can not only make up for the consumption of vitamin C caused 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 peroxidation caused by lead, while vitamin D supplementation can affect the absorption and deposition of lead by regulating calcium and phosphorus. Supplementing vitamins b1, b2, b6, b12 and folic acid can also improve symptoms and promote the recovery of physiological functions.

Eat some lead-expelling foods properly. Many natural foods have certain lead prevention and lead-expelling functions. 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 and be 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 lead absorption and reduce lead toxicity. Food contains some inorganic anions or acid radicals such as iodine ions, phosphate ions, molybdate ions, etc., which can combine with lead and promote it to be discharged from the stool. These nutrients are rich in fruits and vegetables, so people exposed to lead should eat more fruits and vegetables.