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Br J Dermatol:口服维生素B3,帮您锁住水分

2016-05-31 Mechront 译 MedSci原创

女人是水做的,不管你有多少水,随着年龄的增加,皮肤弹性会越来越差,一看就知道不再是二八年华。任其涂抹再多的保湿锁水护肤品,也无法逆转容颜,回到水汪汪的青葱岁月。当然了,生老病死是无法逆转的自然规律,我们能做的是尽量让变化走的缓一点、慢一点,尽享青春年华。 皮肤之所以越来越锁不住水分了,是因为随着年龄的增加,皮肤屏障功能越来越差(老年性皮肤干燥);此外还有一些皮肤病也会导致皮肤屏障功能受损,比

女人是水做的,不管你有多少水,随着年龄的增加,皮肤弹性会越来越差,一看就知道不再是二八年华。任其涂抹再多的保湿锁水护肤品,也无法逆转容颜,回到水汪汪的青葱岁月。当然了,生老病死是无法逆转的自然规律,我们能做的是尽量让变化走的缓一点、慢一点,尽享青春年华。

皮肤之所以越来越锁不住水分了,是因为随着年龄的增加,皮肤屏障功能越来越差(老年性皮肤干燥);此外还有一些皮肤病也会导致皮肤屏障功能受损,比如过敏性湿疹。而目前针对皮肤屏障功能的主要检测指标之一就是经皮水分丢失(TEWL)。

TEWL是通过测定皮肤表面的水蒸气压梯度表明皮肤中水分散失的情况,进而反映皮肤的水通透屏障。当皮肤屏障功能受损时,TEWL值增高,反之亦然。我国正常人的TEWL值是多少呢?有数据显示,40-50岁组的人TEWL值最高,20-30岁的人最低;鼻子TEWL值最高,平均22.5g/㎡h (40-50岁)和19.8g/㎡h (20-30岁)。前臂屈侧(非暴光部位)部位最低,平均8.9 g/㎡h (40-50岁)和7.2 g/㎡ (20-30岁)。说明鼻子的皮肤易受到伤害,要重点呵护。

有证据表明,外用烟酰胺(维生素B3)可通过调节皮肤的水通道蛋白和神经鞘脂类,达到减少TEWL的目标。来自悉尼大学皇家王子阿尔弗雷德医院皮肤病研究所、悉尼大学NHMRC临床试验中心等的研究人员就对“ONTRAC皮肤癌预防研究”的292名参与者进行了试验,评估口服维生素B3对TEWL的影响。

参与者平均年龄66岁(范围:30-91岁),随机分为口服维生素B3 500mg或安慰剂 bid,治疗时间12个月。研究人员在纳入研究时和治疗期间每3个月检测一次参与者额头、前臂和小腿的TEWL情况。



如上图所示,口服维生素B3组与安慰剂组相比TEWL更低;在治疗3个月、6个月、9个月和12个月时候,参与者额头TEWL相对降低百分比分别为:5%(p=0.13)、5%(p=0.13)、6%(p=0.03)和6%(p=0.039)。


参与者四肢TEWL情况比较如上图,口服维生素B3组与安慰剂组相比,治疗3个月、6个月、9个月和12个月时候,参与者四肢TEWL相对降低百分比分别为:2%(p=0.53)4%(p=0.30)1%(p=0.72)8%(p=0.04)

研究者得出结论:口服维生素
B3的耐受性良好,可明显减少额头和四肢的TEWL,是一个潜在的新的可用于改善皮肤屏障功能的口服剂。

所以对自己皮肤保持水分不满意的亲们,可以试试维生素B3。

原始出处:

Chen AC, Martin AJ, Dalziell RA,et al.Oral nicotinamide reduces transepidermal water loss: a randomised controlled trial.Br J Dermatol. 2016 Apr 7. doi: 10.1111/bjd.14648. [Epub ahead of print]



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  2. [GetPortalCommentsPageByObjectIdResponse(id=1701402, encodeId=ee1a1e014023f, content=<a href='/topic/show?id=220ee90625a' target=_blank style='color:#2F92EE;'>#维生素B3#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79062, encryptionId=220ee90625a, topicName=维生素B3)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d94630353217, createdName=wleon8905, createdTime=Tue Oct 25 10:50:00 CST 2016, time=2016-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=106595, encodeId=62cf1065950b, content=深度好文,值得学习,赞!, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Mon Aug 29 07:49:00 CST 2016, time=2016-08-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1508506, encodeId=685f150850671, content=<a href='/topic/show?id=68b0e9055f7' target=_blank style='color:#2F92EE;'>#维生素B#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79055, encryptionId=68b0e9055f7, topicName=维生素B)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=17599981768, createdName=马龙, createdTime=Thu Jun 02 02:50:00 CST 2016, time=2016-06-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=87868, encodeId=39e78e8684e, content=科研好厉害, beContent=null, objectType=article, channel=null, level=null, likeNumber=201, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cache2.medsci.cn//images/medsci_toux.jpg, createdBy=7af91730839, createdName=足球疯子, createdTime=Tue May 31 20:51:00 CST 2016, time=2016-05-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=87811, encodeId=048d8e81197, content=科研是为生活得更好, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=53751677671, createdName=沉心多思, createdTime=Tue May 31 14:57:00 CST 2016, time=2016-05-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=87787, encodeId=fb1f8e7871f, content=(⊙o⊙)哦,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=143, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/04/24/1c2dbd6706e64df33befd6663f1d6b37.jpg, createdBy=94f61661779, createdName=lyh994, createdTime=Tue May 31 12:12:00 CST 2016, time=2016-05-31, status=1, ipAttribution=)]
    2016-08-29 ylzr123

    深度好文,值得学习,赞!

    0

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    2016-06-02 马龙
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    2016-05-31 足球疯子

    科研好厉害

    0

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    2016-05-31 沉心多思

    科研是为生活得更好

    0

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    2016-05-31 lyh994

    (⊙o⊙)哦,学习了

    0

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