A review of studies on blood lead concentrations of traditional Mexican potters

Background: Traditional Mexican potters and their families have been occupationally exposed to lead for centuries; however, studies on blood lead levels (BLL) and their adverse health impact on this population are scarce. There is no safe BLL, even at 1 μg/dL there are associated health effects.

Objective: To systematize and characterize Mexican potters' historic lead exposure through their BLL and associated health outcomes.

Methods: Using PRISMA guidelines, we conducted a systematic review through January 2021 of published studies on BLL and associated health outcomes in Mexican potters.

Results: Fifteen studies containing data from 1980 to 2013 met the inclusion criteria and were published between 1980 and 2018. Study populations ranged from n = 5 to n = 457, and included adult potters (mean BLL 37.9 ± 16.2 μg/dL) and/or their children (mean BLL 22.5 ± 10.5 μg/dL). Studies reported on general lead poisoning symptoms, neurotoxic and nephrotoxic outcomes as well as correlated biomarkers.

Conclusions: Our results confirm high occupational and para-occupational lead exposure. Despite governmental and non-governmental initiatives to promote lead-free glazes, lead continues to be used by traditional potters and their families.