-《中国居民营养与健康状况调查(CNNHS)》抽样评价了例健康孕妇血清维生素D缺乏状况，结果显示大约75％的调查对象处于维生素D缺乏的状态(即：25-羟基维生素D20ng/ml)。维生素D缺乏在怀孕晚期、比较年轻的孕妇以及回民孕妇中更为严重。维生素D缺乏在中国孕妇中非常普遍。原文：VitaminDdeficiencyprevalenceandriskfactorsamongpregnantChinesewomenPublicHealthNutr.Nov20:1-9.[Epubaheadofprint]VitaminDdeficiencyisprevalentamongpregnantChinesewomen.ResidinginareaswithlowambientUVBlevelsincreasestheriskofvitaminDdeficiency,especiallyforwomenexperiencingadvancedstagesofgestation,foryoungerpregnantwomenandforwomenofHuiethnicity;therefore,vitaminDsupplementationandsensiblesunexposureshouldbeencouraged,especiallyinthewintermonths.FurtherstudiesmustdetermineoptimalvitaminDintakeandsunexposurelevelsformaintainingsufficientvitaminDlevelsinpregnantChinesewomen.图片来源：网络中国营养界中国营养学会主办长按识别
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