Blood protoporphyrin IX as a biological indicator of increased absorption of lead

Environmental Lead in Mexico, 1990–2002

“…According to Olaiz et al (1995), the improvement in basic sanitation in the town studied was the major factor to explain the lower BLL found in their study in relation to the values found by Molina et al (1981Molina et al ( ,1982. However, these authors do not explore other possible causes for the improvement, and in fact compare towns in different states, with possibly different pottery manufacturing methods.…”

“…Occupational Exposure Molina et al (1981Molina et al ( , 1982 showed that use of lead oxide for pottery glazing was one of the major causes of lead poisoning and that potters and their families had very high BLL. People living in the same town were also exposed to lead, while the BLL of children of both potters and nonpotters were particularly high.…”