How much lead is considered excessive for children?

Children are very important to every family. Children's health needs special attention because their physical development is not complete and their resistance is relatively weaker, so some minor problems may turn into big problems. Nowadays, many utensils contain lead. If the lead content in the body is too high, it will cause lead poisoning. It is very harmful to the body, so how much lead is considered excessive for children? In fact, there are certain standards.

The diagnosis and classification of lead poisoning in children are mainly based on blood lead levels, which are divided into 5 levels.

Ⅰ. Level 1

Blood lead is less than 99 micrograms (0.099 milligrams)/liter, which is relatively safe (it is already toxic to embryonic development and pregnant women are prone to miscarriage);

Ⅱ. Second level

Blood lead is 100-199 μg/L, hemoglobin metabolism is affected, and nerve conduction velocity decreases;

III. Level 3

Blood lead levels of 200 to 499 micrograms per liter affect iron, zinc, and calcium metabolism, leading to calcium and zinc deficiency and hemoglobin synthesis disorders. Symptoms include low immunity, learning difficulties, lack of concentration, decreased IQ, or physical growth retardation.

IV. Level 4

Blood lead levels of 500 to 699 micrograms per liter may cause symptoms of poisoning, such as volatile personality, irritability, hyperactivity, aggressive behavior, movement disorders, decreased vision and hearing, unexplained abdominal pain, anemia, and arrhythmia;

Ⅴ. Level 5

Blood lead levels ≥700 micrograms/liter can lead to renal damage, lead encephalopathy (headache, convulsions, coma, etc.) and even death.

In developed countries around the world, children's blood lead levels of less than 60 micrograms/liter are relatively safe, and the international blood lead diagnostic standard is ≥100 micrograms/liter for lead poisoning.