Urine lead

The average lead load in adults is 121 mg. The digestive tract consumes about 10% of lead from food and water. About 40% of lead inhaled through the respiratory tract is absorbed. The absorbed lead is distributed in soft tissues such as the liver, spleen, kidney, and brain through the blood. Later, lead is redistributed in the body, and 90% is stored in bones. Lead absorbed into the body is mainly excreted by the kidneys, and a small part is excreted by feces, sweat, saliva, and milk. In daily life, absorption of excess lead (> 0.5mg / d) from the digestive tract (using leaded containers, food, drugs) and the respiratory tract (vehicle exhaust) can cause lead poisoning, cause health hazards, and mainly damage the nervous system and Blood system.