欢迎来到艾兰博曼,请 登录 | 立即注册
查看: 711|回复: 3

【资讯翻译】Low-salt diets may not be beneficial for all, study suggests

[复制链接]

0

听众

0

收听

355

积分

版主

Rank: 7Rank: 7Rank: 7

积分
355
发表于 2016-6-21 13:43:52 | 显示全部楼层 |阅读模式
Low-salt diets may not be beneficial for all, study suggests

A large worldwide study has found that, contrary to popular thought, low-salt diets may not be beneficial and may actually increase the risk of cardiovascular disease (CVD) and death compared to average salt consumption.

In fact, the study suggests that the only people who need to worry about reducing sodium in their diet are those with hypertension (high blood pressure) and have high salt consumption.


The study, involving more than 130,000 people from 49 countries, was led by investigators of the Population Health Research Institute (PHRI) of McMaster University and Hamilton Health Sciences.


They looked specifically at whether the relationship between sodium (salt) intake and death, heart disease and stroke differs in people with high blood pressure compared to those with normal blood pressure.


The researchers showed that regardless of whether people have high blood pressure, low-sodium intake is associated with more heart attacks, strokes, and deaths compared to average intake.


"These are extremely important findings for those who are suffering from high blood pressure," said Andrew Mente, lead author of the study, a principal investigator of PHRI and an associate professor of clinical epidemiology and biostatistics at McMaster's Michael G. DeGroote School of Medicine.


"While our data highlights the importance of reducing high salt intake in people with hypertension, it does not support reducing salt intake to low levels.


"Our findings are important because they show that lowering sodium is best targeted at those with hypertension who also consume high sodium diets."


Current intake of sodium in Canada is typically between 3.5 and 4 grams per day and some guidelines have recommended that the entire population lower sodium intake to below 2.3 grams per day, a level that fewer than five per cent of Canadians and people around the world consume.


Previous studies have shown that low-sodium, compared to average sodium intake, is related to increased cardiovascular risk and mortality, even though low sodium intake is associated with lower blood pressure.


This new study shows that the risks associated with low-sodium intake -- less than three grams per day -- are consistent regardless of a patient's hypertension status.


Further, the findings show that while there is a limit below which sodium intake may be unsafe, the harm associated with high sodium consumption appears to be confined to only those with hypertension.


Only about 10 per cent of the population in the global study had both hypertension and high sodium consumption (greater than 6 grams per day).


Mente said that this suggests that the majority of individuals in Canada and most countries are consuming the right amount of salt.


He added that targeted salt reduction in those who are most susceptible because of hypertension and high salt consumption may be preferable to a population-wide approach to reducing sodium intake in most countries except those where the average sodium intake is very high, such as parts of central Asia or China.


He added that what is now generally recommended as a healthy daily ceiling for sodium consumption appears to be set too low, regardless of a person's blood pressure level.


"Low sodium intake reduces blood pressure modestly, compared to average intake, but low sodium intake also has other effects, including adverse elevations of certain hormones which may outweigh any benefits. The key question is not whether blood pressure is lower with very low salt intake, instead it is whether it improves health," Mente said

Dr. Martin O'Donnell, a co-author on the study and an associate clinical professor at McMaster University and National University of Ireland Galway, said: "This study adds to our understanding of the relationship between salt intake and health, and questions the appropriateness of current guidelines that recommend low sodium intake in the entire population."


"An approach that recommends salt in moderation, particularly focused on those with hypertension, appears more in-line with current evidence." The study was funded from more than 50 sources, including the PHRI, the Heart and Stroke Foundation of Canada and the Canadian Institutes of Health Research.



https://www.sciencedaily.com/releases/2016/05/160521071410.htm




0

听众

0

收听

159

积分

注册会员

Rank: 2

积分
159
发表于 2016-6-21 13:48:32 | 显示全部楼层
这篇我领了

0

听众

0

收听

159

积分

注册会员

Rank: 2

积分
159
发表于 2016-6-21 14:36:07 | 显示全部楼层
研究表明低盐饮食并不一定有益于所有人

一个大型的世界范围研究发现,与常识有所出入的,低盐饮食可能不是有益的,与常规盐摄取量人群相比,减少盐的摄取量反而有可能会增加患心血管疾病(CVD)和导致死亡的风险。

实际上,研究建议只有那些高血压患者及高盐摄取量人群需要担心他们的钠摄取量。

该项研究由麦克马斯特大学的人口健康研究所(PHRI)和汉密尔顿健康科学的调研人员开展,包含了来自49个国家的13万人。

他们重点研究和对比了高血压患者与正常血压人群的钠(盐)摄入量,探索该因素与死亡、心脏病、中风是否存在一定的关联。

研究人员表示,与平均钠摄取量人群相比,不管人们是否患有高血压,低钠摄取量都与心脏病、中风及死亡有很大的关联。

该研究的领导者,PHRI首席研究员,麦克马斯特大学Michael g . DeGroote医学院临床流行病学和生物统计学副教授安德鲁•门特说到,“这些发现对于饱受高血压病症折磨的病人来说非常重要”。

“虽然我们的数据凸显了高血压患者减少盐摄入量的重要性,但是并没有支持把盐摄入量降低到更低的水平”。

我们的发现很重要是因为这表明了只有那些消耗高钠饮食的高血压患者才有必要变更为较低的钠摄取量”。

目前,加拿大的人均钠摄入量约为3.5克到4克间,同时有一些人建议全人类每天的钠摄入量应该低于每天2.3克,低于加拿大人及其他地方的人群的盐的摄入量5%。

之前的研究已经表明,即使低钠摄入量也与较低血压相互关联,与平均钠摄入量相比较低的钠摄入量仍会增加心血管疾病风险和死亡数。

最新研究表明,不管高血压患者的状态如何,以上风险与少于每天3克的低钠摄入量者是一致的。

此外,研究发现表明,低于钠标准摄入量也是不安全的,限制钠的高摄入量仅仅是针对那些高血压患者。

研究表明,全球大约10%的人群既是高血压又是高钠摄入者(每天钠的摄入量高于6克)。

门特表示,这个建议对于加拿大及大多数国家的大多数人群的盐的使用量量还是适用的。

他补充道,这种方法对于那些同时是高血压患者和高钠摄入量的人群最需要减少钠的摄入量最可取。而且基本适用于全球大多数国家,除了那些盐摄入量相当高的国家,比如中亚或中国的部分地区。

他还补充道,无论个人的血压水平,现在通常建议的每天钠摄入量标准偏低。

门特表示:“与平均钠摄入量相比,减少钠摄入量可以适当地降低血压,但是钠摄入量降低还会导致其他的一些副作用,包括某些激素水平的非正常升高,这可能会让减少钠摄入量带来的好处被掩盖。关键问题并非降低盐摄入量是否会让血压更低,而是这样是否能够真正改善健康。“

马丁•奥唐奈博士,该研究的合著者,麦克马斯特大学和爱尔兰高威国立大学临床副教授说到,“该研究增益了我们研究盐摄入量与健康的关系,并解释对全人类建议减少钠的摄入量的适当性的困惑。“

“最好的方法为适当降低摄入盐量,特别针对高血压人群,目前的证据更能表现这个”。该研究经费得到超过50家机构的支持,其中包括PHRI,加拿大心脏与中风基金会及加拿大卫生研究院。

0

听众

0

收听

355

积分

版主

Rank: 7Rank: 7Rank: 7

积分
355
 楼主| 发表于 2016-6-22 13:38:06 | 显示全部楼层
收了
您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

© 2013 艾兰博曼 All Rights Reserved.
( 浙ICP备07020270号-8 )
 
快速回复 返回顶部 返回列表