Breaking News
Nagaland Post Logo
You are here:  Skip Navigation LinksHome » Show story
Salt in a single meal affects blood flow
Published on 9 May. 2011 12:33 AM IST
Print  Text Size

It takes a mere 30 minutes for a single salty meal to constrict the blood flow in your arteries.
Scientists tested how quickly salt had a damaging effect on the body by recruiting healthy adults and feeding them each a high-salt meal, containing four grams, and later a low-salt meal, made with just 0.3 grams.
Before and after each meal, they tested how smoothly blood was flowing in the brachial artery - the main blood vessel in the upper arm which is normally used for checking blood pressure, the American Journal of Clinical Nutrition reports.
Although the artery does not measure blood flow directly to the heart, it is commonly used to give an indication of cardiovascular health, according to the Daily Mail, which quoted the journal.
In a report on the findings, the authors from a group of research organisations in Adelaide in Australia said: “This study showed the amount of salt similar to that in a commonly eaten meal impairs blood flow in healthy men and women.” Graham MacGregor, chairman of the UK-based lobby group Consensus Action on Salt and Health, said: “That’s not particularly high and is probably average for many meals consumed in the UK.”
“In fact, if you eat out you will probably consume more than that. This kind of damage to the blood flow is thought to be a very early sign of heart disease,” he added. The daily recommended amount in the UK is no more than 6 gm, but it is estimated that most people eat around 8.6 gm.
Health experts estimate that cutting average consumption by just a couple of grams a day would slash strokes by 22 per cent and heart attacks by 16 per cent.
Accordingly, recent guidelines recommend reduction of daily consumption of salt to 6 g/day. Understanding of how salt affects blood pressure and renal function has recently been advanced in 2 respects. The past concept that salt acts by expanding the extracellular fluid space has been challenged by the demonstration of water-free sodium storage of salt in tissues. Furthermore, salt promotes the secretion of cardiotonic steroids, i.e., mammalian “digitalis.” Initial observations suggest a causal role for cardiotonic steroids in the genesis of cardiac abnormalities in advanced renal disease.

Comments:(0) Login or Register to post your Comment
(Available for registered users only)
More News