title: Fish consumption during child bearing age: a quantitative risk-benefit analysis on neurodevelopment.
abstract: The fish ingredient N3-docosahexaenoic acid 22:6 n-3 (DHA) stimulates brain development. On the other hand methylmercury (MeHg) in fish disturbs the developing central nervous system. In this Context the IQ score in children is considered as an aggregate measure of in utero brain development. To determine the effect of DHA exposure on prenatal neurodevelopment the maternal DHA intake during pregnancy was compared with its epidemiologically observed effect on the IQ score of children. For MeHg the maternal intake was converted into its accumulation in the maternal body. The maternal body burden then was compared with its epidemiologically observed relationship with the IQ score. Taking the MeHg and DHA content of 33 fish species the net effect of these compounds on the IQ score was quantified. For most fish species the adverse effect of MeHg on the IQ score exceeded the beneficial effect of DHA. In the case of long-living predators a negative effect up to 10 points on the IQ score was found. The results of this study indicate that food interventions aiming at the beneficial effects of fish consumption should focus on fish species with a high DHA content, while avoiding fish species with a high MeHg content.
authors.affiliation: National Institute for Public Health and the Environment, Bilthoven, The Netherlands. Marco.Zeilmaker@rivm.nl
authors.forename: Marco J
authors.initials: MJ
authors.lastname: Zeilmaker
authors.forename: Jeljer
authors.initials: J
authors.lastname: Hoekstra
authors.forename: Jan C H
authors.initials: JC
authors.lastname: van Eijkeren
authors.forename: Nynke
authors.initials: N
authors.lastname: de Jong
authors.forename: Andy
authors.initials: A
authors.lastname: Hart
authors.forename: Marc
authors.initials: M
authors.lastname: Kennedy
authors.forename: Helen
authors.initials: H
authors.lastname: Owen
authors.forename: Helga
authors.initials: H
authors.lastname: Gunnlaugsdottir
mesh_terms: D000328:Adult; D001822:Body Burden; D002490:Central Nervous System / Q000196:embryology*; D002648:Child; D004281:Docosahexaenoic Acids / Q000008:administration & dosage; D005260:Female; D006801:Humans; D018811:Maternal Exposure; D008767:Methylmercury Compounds / Q000493:pharmacokinetics / Q000633:toxicity; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D018570:Risk Assessment; D017747:Seafood
chemical_list: D008767:Methylmercury Compounds; D004281:Docosahexaenoic Acids