Alejandra Cantoral1, Carolina Batis2, Niladri Basu3. 1. CONACYT, National Institute of Public Health, Center for Research on Nutrition and Health, Mexico. Electronic address: alejandra.cantoral@insp.mx. 2. CONACYT, National Institute of Public Health, Center for Research on Nutrition and Health, Mexico. 3. Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada.
Abstract
BACKGROUND: Seafood is a good source of Omega-3 polyunsaturated fatty acids (ω3-PUFA) but also contains the toxic contaminant methylmercury (MeHg). National estimates of exposure to both compounds through seafood intake in Mexico are not known. The objective of the current study was to describe national seafood consumption habits and to estimate seafood-based exposure to ω3-PUFAs and MeHg. METHODS: We analyzed data from a 24-h dietary recall extracted from the 2012 National Health and Nutrition Survey of Mexico (n = 10,096 subjects aged 1y and older). National per capita seafood intake as well as information on age, sex, socioeconomic status, and geographic region was obtained. The contribution of each seafood item to the total MeHg exposure was estimated, as was the balance between estimated exposures to ω3-PUFAs and MeHg. RESULTS: A mean daily seafood intake of 10 g/day was estimated. The top species consumed in decreasing order were: canned tuna, sunfish, shrimp, mullet, carp and schoolshark (constituted 60% of seafood intake). Canned tuna and schoolshark contributed 75% of the population's estimated exposure to MeHg. The best balance of population-level exposures to ω3-PUFAs and MeHg was found in salmon, sardine, trout and anchovies. CONCLUSION: Environmental dietary exposure to MeHg is a public health concern and thus a good understanding of seafood consumption is needed to create national consumption guidelines. The current study provides nationally-representative data in Mexico from which decisions can be made (e.g., UN Minamata Convention) and future studies conducted.
BACKGROUND: Seafood is a good source of Omega-3 polyunsaturated fatty acids (ω3-PUFA) but also contains the toxic contaminant methylmercury (MeHg). National estimates of exposure to both compounds through seafood intake in Mexico are not known. The objective of the current study was to describe national seafood consumption habits and to estimate seafood-based exposure to ω3-PUFAs and MeHg. METHODS: We analyzed data from a 24-h dietary recall extracted from the 2012 National Health and Nutrition Survey of Mexico (n = 10,096 subjects aged 1y and older). National per capita seafood intake as well as information on age, sex, socioeconomic status, and geographic region was obtained. The contribution of each seafood item to the total MeHg exposure was estimated, as was the balance between estimated exposures to ω3-PUFAs and MeHg. RESULTS: A mean daily seafood intake of 10 g/day was estimated. The top species consumed in decreasing order were: canned tuna, sunfish, shrimp, mullet, carp and schoolshark (constituted 60% of seafood intake). Canned tuna and schoolshark contributed 75% of the population's estimated exposure to MeHg. The best balance of population-level exposures to ω3-PUFAs and MeHg was found in salmon, sardine, trout and anchovies. CONCLUSION: Environmental dietary exposure to MeHg is a public health concern and thus a good understanding of seafood consumption is needed to create national consumption guidelines. The current study provides nationally-representative data in Mexico from which decisions can be made (e.g., UN Minamata Convention) and future studies conducted.
Authors: Erica C Jansen; Deirdre A Conroy; Helen J Burgess; Louise M O'Brien; Alejandra Cantoral; Martha María Téllez-Rojo; Karen E Peterson; Ana Baylin Journal: J Nutr Date: 2020-03-01 Impact factor: 4.798
Authors: Erica C Jansen; Emily C Hector; Jaclyn M Goodrich; Alejandra Cantoral; Martha María Téllez Rojo; Niladri Basu; Peter X K Song; Libni Torres Olascoaga; Karen E Peterson Journal: Environ Res Date: 2020-09-18 Impact factor: 6.498
Authors: Collin A Eagles-Smith; Ellen K Silbergeld; Niladri Basu; Paco Bustamante; Fernando Diaz-Barriga; William A Hopkins; Karen A Kidd; Jennifer F Nyland Journal: Ambio Date: 2018-03 Impact factor: 5.129