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Lead and its compounds are toxic; once they enter the body, they can cause harm to various systems such as the nervous system, blood-forming organs, digestive system, kidneys, cardiovascular system, and endocrine system. Most cases of lead poisoning encountered today are mild chronic forms, with the main issue being the effect of lead on metal ions and enzyme systems in the body, leading to disorders of the autonomic nervous system, anemia, and reduced immunity. Appropriate nutritional measures can enhance resistance, improve the body’s ability to metabolize and detoxify toxic substances, reduce the absorption of toxins, and facilitate their conversion into non-toxic substances that are then excreted from the body, thereby aiding in recovery or alleviating symptoms of poisoning. ●The diet should contain an adequate amount of high-quality protein, especially proteins rich in sulfur-containing amino acids (such as cysteine), which helps to reduce lead levels in the body and can also alleviate symptoms of poisoning. Protein deficiency can reduce the body’s ability to excrete lead, increase its accumulation in the body, and enhance susceptibility to lead poisoning. The general daily protein intake should be 1.5 g per kilogram of body weight, with animal proteins and bean proteins such as milk, eggs, lean meat, poultry, fish and shrimp, soybeans, and soy products accounting for more than half of this amount. ●People exposed to lead should pay attention to calcium supplementation. Adjusting the ratio of calcium to phosphorus in the diet can help reduce the body’s lead load. The diet of our country’s population is based mainly on grains, supplemented by meat and soy products. These foods are rich in phosphorus, which meets the body’s needs for this element, while the supply of calcium is relatively insufficient. Taking an appropriate amount of calcium can reduce lead absorption, lower lead toxicity, and alleviate symptoms of lead poisoning. ●People exposed to lead often suffer from vitamin deficiencies; therefore, when planning their diet, it is important to choose foods rich in vitamins, with vitamin C being particularly significant. Lead can accelerate the consumption of vitamin C, rendering it ineffective for its physiological functions; therefore, long-term exposure to lead can lead to a deficiency in vitamin C in the body, resulting in symptoms such as gum bleeding. Appropriate intake of vitamin C not only helps to replenish the vitamin C depleted by lead and alleviate the symptoms of lead poisoning, but it also binds with lead in the intestines to form lead ascorbate, which has lower solubility, thereby reducing the absorption of lead. Additionally, vitamin C contributes to the detoxification process by directly or indirectly protecting sulfhydryl enzymes, thus facilitating the excretion of lead. Appropriate supplementation with vitamin E can counteract the peroxidation caused by lead, while vitamin D can influence the absorption and deposition of lead by regulating calcium and phosphorus levels. Supplementing with vitamins B1, B2, B6, B12, and folic acid can also be effective in improving symptoms and aiding in the recovery of physiological functions. Among them, vitamin B1 shows particularly significant efficacy. ●Trace elements such as iron, zinc, copper, magnesium, selenium, and germanium can all interact with lead to reduce its toxicity. Iron deficiency increases lead absorption, leading to higher levels of lead in soft tissues and bones. A low-copper diet can increase lead absorption and enhance the toxicity of lead. Zinc can affect the accumulation and toxicity of lead; increasing zinc intake can reduce lead levels in tissues and alleviate the severity of lead poisoning. Recent studies have also shown that organic selenium and organic germanium have a certain antagonistic effect on lead. ●Polymerous substances such as pectin, alginic acid, and dietary fiber contain numerous free –OH and –COOH groups on their sugar chains, which can complex with lead to form insoluble gels. This prevents the absorption of lead in the gastrointestinal tract, thereby aiding in its elimination from the body. Many natural foods have certain functions in preventing and expelling lead. The proteins in milk can bind with lead to form insoluble substances, while the calcium contained in milk can prevent the absorption of lead. Tannic acid in tea can form soluble complexes with lead, which are then excreted in urine. Iodine and alginic acid in kelp can promote the excretion of lead. Sulfides in garlic and onions can counteract the toxic effects of lead. Sea buckthorn, rose hips, and kiwifruit are rich in vitamin C, which can prevent the absorption of lead and reduce its toxicity. There are also many other components in food that can chelate lead, such as phytic acid, phospholipids, citric acid, malic acid, succinic acid, and polyamino acids. Some inorganic anions or acid radicals, like iodide ions, phosphate ions, and molybdate ions, can bind to lead and help expel it through feces. These nutrients are abundant in fruits and vegetables; therefore, people exposed to lead should consume more of them. Health News