OBJECTIVE: The relationship between daily calcium intake and blood lead levels was evaluated among children under five years of age living in Mexico City. METHODS: A random sample of 200 children under five years of age, resident in two neighborhoods of Mexico City was selected: Xalostoc, an industrial neighborhood, and Tlalpan, a residential neighborhood (100 from each area). The mothers of these children filled out a questionnaire on predictors of blood lead levels including daily calcium intake. Lead levels were determined from the venous blood samples. Calcium intake was assessed using a short Food Frequency Questionnaire including 11 food items that accounted for 95% of calcium intake in Mexico. RESULTS: The average blood lead level was 9.93 microg dl(-1) (range 1-31 microg dl(-1)). An inverse relationship was observed between blood lead levels and daily calcium intake. This relationship was statistically significant among children aged 13 months-5 years. CONCLUSION: The results suggest that calcium provided a protective effect against lead accumulation in the body among children. Further studies should be undertaken to evaluate this hypothesis through experimental design.
OBJECTIVE: The relationship between daily calcium intake and blood lead levels was evaluated among children under five years of age living in Mexico City. METHODS: A random sample of 200 children under five years of age, resident in two neighborhoods of Mexico City was selected: Xalostoc, an industrial neighborhood, and Tlalpan, a residential neighborhood (100 from each area). The mothers of these children filled out a questionnaire on predictors of blood lead levels including daily calcium intake. Lead levels were determined from the venous blood samples. Calcium intake was assessed using a short Food Frequency Questionnaire including 11 food items that accounted for 95% of calcium intake in Mexico. RESULTS: The average blood lead level was 9.93 microg dl(-1) (range 1-31 microg dl(-1)). An inverse relationship was observed between blood lead levels and daily calcium intake. This relationship was statistically significant among children aged 13 months-5 years. CONCLUSION: The results suggest that calcium provided a protective effect against lead accumulation in the body among children. Further studies should be undertaken to evaluate this hypothesis through experimental design.
Authors: Katarzyna Kordas; Rachael Burganowski; Aditi Roy; Fabiana Peregalli; Valentina Baccino; Elizabeth Barcia; Soledad Mangieri; Virginia Ocampo; Nelly Mañay; Gabriela Martínez; Marie Vahter; Elena I Queirolo Journal: Environ Int Date: 2017-11-21 Impact factor: 9.621
Authors: Claudia S Riedt; Brian T Buckley; Robert E Brolin; Hasina Ambia-Sobhan; George G Rhoads; Sue A Shapses Journal: J Expo Sci Environ Epidemiol Date: 2008-03-05 Impact factor: 5.563
Authors: Jianghong Liu; Linda McCauley; Charlene Compher; Chonghuai Yan; Xiaoming Shen; Herbert Needleman; Jennifer A Pinto-Martin Journal: Environ Health Date: 2011-04-01 Impact factor: 5.984