铅是一种对人体十分有害的重金属,它可与人体内的一系列蛋白质、酶和氨基酸结合,干扰机体许多方面的生化和生理活动。当人体血液中含铅量达0.6%～0.8%时,就会引起贫血、痢疾、便秘、心血管病等慢性中毒症状,对于孕妇,危害就更大,慢性铅中毒妇女生下的孩子往往发育不良,甚至弱智。食品是怎样受到铅污染的呢?首先是使用铅量过高 Lead is a heavy metal that is very harmful to the human body. It binds to a range of proteins, enzymes and amino acids in the body and disrupts many aspects of the body’s biochemical and physiological activities. When the body’s blood lead content of 0.6% to 0.8%, it will cause anemia, dysentery, constipation, cardiovascular disease and other symptoms of chronic poisoning, for pregnant women, even greater harm to children with chronic lead poisoning often give birth to children Bad, or even mentally handicapped. How is food contaminated by lead? The first is to use too much lead