New York – People who ate lots of salt were not more likely to get high blood pressure, and were less likely to die of heart disease than those with a low salt intake, in a new European study.
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The findings “certainly do not support the current recommendation to lower salt intake in the general population,” study author Dr. Jan Staessen, of the University of Leuven in Belgium, told Reuters Health.
Current salt guidelines, including those released by the U.S. government in January, are based on data from short-term studies of people who volunteered to be assigned to a low-salt or high-salt diet, Staessen said.
The U.S. guidelines recommend that Americans consume less than 2,300 milligrams of salt daily – 1,500 mg in certain people who are more at risk for high blood pressure or heart disease.
While previous trials suggested a blood pressure benefit with lower salt intake, research has yet to show whether that translates into better overall heart health in the wider population.
The researchers used data from two different studies, incorporating a total of about 3,700 Europeans who had their salt consumption measured through urine samples at the start of the studies. Staessen and his colleagues broke the participants up into three groups: those with highest and lowest salt intakes, and those with average intake.
None of the participants had heart disease at the outset, and two thirds had normal blood pressure. They were followed for an average of 8 years, during which researchers determined how many of them were diagnosed with heart disease, and in a smaller group, how many got high blood pressure.
The findings are published in the Journal of the American Medical Association (JAMA).
The chance of getting heart and blood vessel diseases did not differ in the three groups. However, participants with the lowest salt intake had the highest rate of death from heart disease during the follow up (4 percent), and people who ate the most salt had the lowest (less than 1 percent).
Across all three salt-intake groups, about one in four study participants who started out with normal blood pressure were diagnosed with high blood pressure during follow up.
The researchers did find that one measure of blood pressure, systolic blood pressure, increased as salt intake increased over time – but the change was very small, so it may not be important to health outcomes, Staessen said.
Reducing salt may still be a good idea for people who already have high blood pressure or who have had heart problems in the past, he added, but the study found no evidence that dietary salt causes those conditions to arise.
“It’s clear that one should be very careful in advocating generalized reduction in sodium intake in the population at large,” Staessen said. “There might be some benefits, but there might also be some adverse effects.”
Dr. Hillel Cohen, an epidemiologist at the Albert Einstein College of Medicine in New York, told Reuters Health that when restaurants or food companies put less salt in their products, they may put in other potentially harmful products to make up for the lost taste, or as preservatives.
Consumers shouldn’t change their salt-eating behavior based on the limited studies that have tried to determine the link between sodium and heart risks, added Cohen, who was not involved in the current research.
The authors caution that their analysis included only white Europeans, and so the results may not translate to people of other ethnicities.
salt is very important to health, but, it should be eaten as a natural sea salt without the additives and all the minerals intact.
If you care to look in the ingredients of some salt, you will see added synthetic material. NOT NEEDED as salt can last forever. its accualy used as a preservative. there is bad salt, and natural salt.
But it still is very unhealthy for people with cancer, as salt is one of the things helping cvancer grow ch”v
another day another contradicting study. i never took stock in the original study. what is scary is that the govt. delegates and regulates based on this misinterpreted data.
The thing that is really interesting is that if you go to the Journal of the American Medical Association’s website (JAMA, the same people who published this study), one of their top stories now is that people with increased sodium excretion (i.e if you have too much salt) have an increased risk for heart attacks!
http://jama.ama-assn.org/content/305/17/1777.short
It actually depends which type of salt is used there are numerous kinds.
Dr. Cohen is one of my colleagues. (I spoke with him just today about a different study.) He is an outstanding researcher and I agree with him on this issue.
Part of the equation may also be that folk with higher salt intake get the additional salt from their salt shaker, so to speak. And in this country most of that (with the notable exception of “kosher salt”) is iodized.
The salt used in processed foods usually doesn’t have iodine in it.
So… reducing salt often means cutting down the iodine in your diet. Which can cause all sorts of ugliness.
Salt is sodium chloride. Required for human life. Excess sodium is excreted through urine and through the skin. Without a massive overdose, there are very few ways for salt to pose any health risk. Exotic salts are not any more healthy than plain old Morton’s, except that they contain elements like floride and magnesium, which are not needed or helpful and do not contain iodide. People who do not consume shellfish must supplement their diet with iodide.
If eating salty food is no big deal, why do my ankles swell up when I ingest too much salt? Can that possibly be a good thing?