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FFA Issue 29 - Newsbites
May 14, 2007

 

平衡风险和效益-营养学界的经典难题

 

美国进行了一项深入地研究,探讨母亲在怀孕期间食用不同水平的海鲜对孩子生长发育可能带来什么样的好处或坏处,结果发现母亲在怀孕期间每周吃海鲜少于340克会增加孩子在以下方面得分少的风险:词汇能力、亲社会行为 、良好运动能力、交流和社会适应力。数据显示母亲每周食用海鲜超过340克对孩子的发育有好处。在美国,建议孕妇每周食用的海鲜量不超过340克,因为海鲜中残留有汞,会对胚胎的神经系统造成影响。但海鲜又是美国饮食中w-3脂肪酸的重要来源,w-3脂肪酸是神经系统健康发育所必需的。这个研究说明目前关于海鲜摄入量的建议还有待商榷,因为限制海鲜的摄入从总体来说可能是有害的。这个研究也强调了进行全面风险效益分析的重要性,以保证健康建议和政策是建立在对所有证据进行全面分析的基础上。如需更多信息请参阅:Hibbeln et al (2007); Lancet 369:578-585 Maternal seafood consumption in pregnancy and neurodevelopmental outcomes in childhood (ALSPAC study): an observational cohort study. DOI:10.1016/S0140-6736(07)60277-3

 
 

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