孕期补充DHA真能让宝宝更聪明?

2016-05-31 刘磊 医学界妇产科频道

孕妇和乳母需合理膳食,维持DHA水平,有利于母婴健康。 生一个健康聪明的宝宝一直是每个妈妈的心愿,我们经常会听到有孕妇会问,孕期要不要补充DHA?补充DHA能让宝宝更聪明吗?今天我们将会以现有的研究证据来回答这些问题。 DHA是什么,有什么用? Docosahexaenoic Acid(DHA),中文称二十二碳六烯酸,是脂肪酸家族中的一员,属n-3长链多不饱和脂肪酸(

孕妇和乳母需合理膳食,维持DHA水平,有利于母婴健康。

生一个健康聪明的宝宝一直是每个妈妈的心愿,我们经常会听到有孕妇会问,孕期要不要补充DHA?补充DHA能让宝宝更聪明吗?今天我们将会以现有的研究证据来回答这些问题。

DHA是什么,有什么用?

Docosahexaenoic Acid(DHA),中文称二十二碳六烯酸,是脂肪酸家族中的一员,属n-3长链多不饱和脂肪酸(long-chain polyunsaturated fatty acids,LC-PUFAs)。

DHA是人体必需的一种LC-PUFAs,是细胞膜的重要组成成分,在人类大脑和视网膜中表达较多。可参与脑细胞的形成和发育,对神经细胞轴突的延伸和新突起的形成有重要作用,可维持神经细胞的正常生理活动,参与大脑思维和记忆形成过程。除此之外,DHA对促进视网膜的发育和视功能的发展,改善视敏锐性等方面也具有重要作用。

孕妇补充DHA能让孩子更聪明?目前研究结论尚不统一

在胎儿时期,神经系统的发育领先于其他各系统,新生儿的脑重已达成人脑重的25%左右,此时神经细胞数量已接近成人,但其树突和轴突少而短。由此可见,孕期是胎儿大脑发育的关键时期。孕期补充DHA是否对宝宝智力发育有促进作用,各方结论目前尚不统一。

2010年10月美国医学会杂志(JAMA)发表的一篇关于孕期补充DHA对儿童神经发育的随机对照研究指出,参与研究的孕妇每日补充含DHA 800mg的鱼油,通过对其子代中726名18个月大的儿童统计分析得到的结论是,与对照组相比,孕妇补充含DHA丰富的鱼油并不能提高孩子的认知和语言能力。

2013年5月发表在美国临床营养学杂志(American journal of clinical nutrition)上一个相关的研究报道,该研究旨在于研究孕妇补充长链多不饱和脂肪酸对儿童早期认知功能的影响,研究人员对5272名研究对象的系统回顾分析发现, 对于长链多不饱和脂肪酸能够提高儿童认知功能的观点,基于目前的研究证据,不支持也不反对该观点。

2013年9月发表在《美国临床营养学杂志》上的另一篇的研究报道,研究对象包括13988名8岁儿童,研究人员通过对这些儿童进行智力测试后统计发现,孕妇补充DHA对孩子的大脑发育确实具有促进作用,不过他们发现这种很微弱。

2015年7月Delgado-Noguera MF等在《Cochrane Database Syst Rev》的报道的研究也得到了上述相似的结论,他们的研究结论认为,基于目前的研究证据,孕妇补充长链多不饱和脂肪酸似乎并不能促进孩子的神经系统发育,但是也没有确切的研究结论来支持或反对孕妇补充长链多不饱和脂肪酸。

2016年2月Michael J. Weiser等在《Nutrients》 上报道,他们对补充DHA对人类一生认知功能影响的回顾分析发现,孕妇补充DHA能够给孩子带来认知功能发展上的益处。

国内专家对于孕妇补充DHA的共识

2015年2月发表在《中国生育健康杂志》的中国孕产妇及婴幼儿补充DHA的专家共识中指出,DHA对婴幼儿神经功能发育方面有积极作用,但仍有较多科学问题需进一步探究。维持机体适宜的DHA水平,有益于改善妊娠结局、婴儿早期神经和视觉功能发育,也可能有益于改善产后抑郁以及婴儿免疫功能和睡眠模式等。孕妇和乳母需合理膳食,维持DHA水平,有利于母婴健康。指南指出,联合国粮农组织专家委员会和国际围产医学会专家委员会建议,孕妇和乳母每日摄入DHA不少于200mg。2013年中国营养学会也提出相同建议。可通过每周食鱼2-3餐且有1餐以上为富脂海产鱼,每日食鸡蛋1个来加强DHA摄入。食用富脂海产鱼,亦需考虑可能的污染物情况。

指南同时最后也指出,对于中国母婴DHA的摄入水平、营养状况和相关干预性研究的证据较少,亟待开展相关研究。

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    2016-06-02 Boyinsh
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    2016-06-01 老段

    孕期保健

    0

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    2016-05-31 明崖

    希望进一步研究的出现

    0

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    2016-05-31 足球疯子

    孕期保健好重要

    0

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    2016-05-31 1dd8c52fm63(暂无匿称)

    了解一下!

    0

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    2016-05-31 沉心多思

    正常饮食,均衡饮食,其它未必靠谱

    0

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