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JAMA Cardiol:大剂量补充维生素D不能预防心血管病

2017-04-20 朱柳媛 中国循环杂志

近年来的研究表明,补充维生素D对心血管病无明显预防作用,但有人推测,阴性结果的得出可能与维生素D补充剂量较低有关。然而,近期发表在JAMA心脏病学子刊上的一项来自新西兰的大规模随机、双盲、安慰剂对照研究证实,每月服用高剂量的维生素D也没有心血管病预防作用,并且与受试者的基线 25(OH)D水平无关。在该研究中,维生素D组受试者第一个月口服20万IU(5 mg)的维生素D3,此后每月口服10万IU(

近年来的研究表明,补充维生素D对心血管病无明显预防作用,但有人推测,阴性结果的得出可能与维生素D补充剂量较低有关。

然而,近期发表在JAMA心脏病学子刊上的一项来自新西兰的大规模随机、双盲、安慰剂对照研究证实,每月服用高剂量的维生素D也没有心血管预防作用,并且与受试者的基线 25(OH)D水平无关。

在该研究中,维生素D组受试者第一个月口服20万IU(5 mg)的维生素D3,此后每月口服10万IU(2.5 mg)。

中位随访3.3年期间,维生素D组和对照组中心血管病发生率分别为11.8%和11.5%,两组之间无明显差异。

入选该研究时,受试者的平均 25(OH)D水平为26.5 ng/ml,其中1/4的受试者处于维生素D缺乏状态,即 25(OH)D水平<20 ng/ml。即便在维生素D缺乏的受试者中,补充高剂量维生素D也没有心血管病预防作用。

该研究纳入5100多例50~84岁的受试者,随机分成维生素D组和对照组。

原始出处:

Robert Scragg, Alistair W.Stewart, Debbie Waayer, et al. Effect of Monthly High-Dose Vitamin D Supplementation on Cardiovascular Disease in the Vitamin D Assessment Study A Randomized Clinical Trial. JAMA Cardiol, published online 5 April 2017.

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