The latest research in the United States confirms that children with blood lead above 25 μ g/L are at risk of dental caries and abnormal learning behavior. It is recognized by experts at home and abroad that children's blood lead exceeding 50 μ g/L will affect their intellectual development and cause problems in reading, operation, memory and attention. The World Congress of Pediatrics unanimously passed that as long as the blood lead content of children exceeds 100 μ g/L, regardless of clinical symptoms and other biochemical changes, they are all diagnosed as lead poisoning in children, and those with blood lead exceeding 200 μ g/L are classified as moderate lead poisoning; The Ministry of Health of China said that children's blood lead level exceeded 100 μ g/L, and it exceeded 200 μ g/L, which led to mild lead poisoning. Professional doctors consider clinical intervention only when blood lead exceeds 450.
Moreover, the side effects of drugs used for clinical intervention in lead excretion are very large and need hospitalization. If children or adults with slightly higher blood lead can choose food-grade lead-discharging products, Dr. Futang Zhu, the founder of Beijing Children's Hospital, clearly pointed out in his "Futang Zhu Practical Pediatrics" that even if it does not reach the standard level, it is still necessary to discharge lead, and the first choice is metallothionein biological beverage, 1-2 every day and 1 in the morning and evening.