Americans still consume more salt than they should, despite decades of warnings connecting high salt diets with an increase in blood pressure and a higher risk of heart disease and stroke. A new Harvard study finds salt intake is about the similar today as it was nearly 50 years ago, an amount well above suggested guidelines, noted Dr. Adam M. Bernstein, the study's lead author. Bernstein, a research fellow in the Harvard School of Public Health's section of nutrition, and colleague Dr. Walter C. Willett analyzed 38 studies, published between 1957 and 2003, that statement the amount of salt that the more than 26,000 participants passed in their urine. This test is the most dependable estimate of salt intake.
The researchers thought they would find that salt intake had enlarged over time because Americans eat more processed foods today than in 1957. But decade after decade, people every time consumed about 3,700 milligrams of sodium a day, the data showed. Present sodium rule advise up to 2,300 milligrams a day for adults, and 1,500 milligrams for those who have or are at risk for huge blood pressure. The study appear in the November issue of the American magazine of Clinical Nutrition. Since the 1980s, the U.S. government has suggested cutting back on salt in order to reduce blood pressure and cardiovascular disease risk. But the ongoing U.S. National Health and Nutrition Examination Survey, which give a snapshot of Americans' health and nutrition position every two years, regularly suggests that Americans eat more salt now than they did 20 or 30 years ago, Bernstein said.
However, those data are based in part on review participant recalling what they ate, rather than on the more correct urine samples. The study also noted that although Americans' salt intake has remained comparatively constant for almost 50 years, their rates of high blood pressure and heart disease have amplified in the past 20 years. But America's ever rising obesity rates may play a more serious role in this rise than salt intake, the researchers said. The study's main message "is that for all the strong effort to get Americans to limit their salt intake, the evidence suggests that this has not happened," said Dr. David McCarron, lead author of an accompanying journal editorial.
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The researchers thought they would find that salt intake had enlarged over time because Americans eat more processed foods today than in 1957. But decade after decade, people every time consumed about 3,700 milligrams of sodium a day, the data showed. Present sodium rule advise up to 2,300 milligrams a day for adults, and 1,500 milligrams for those who have or are at risk for huge blood pressure. The study appear in the November issue of the American magazine of Clinical Nutrition. Since the 1980s, the U.S. government has suggested cutting back on salt in order to reduce blood pressure and cardiovascular disease risk. But the ongoing U.S. National Health and Nutrition Examination Survey, which give a snapshot of Americans' health and nutrition position every two years, regularly suggests that Americans eat more salt now than they did 20 or 30 years ago, Bernstein said.
However, those data are based in part on review participant recalling what they ate, rather than on the more correct urine samples. The study also noted that although Americans' salt intake has remained comparatively constant for almost 50 years, their rates of high blood pressure and heart disease have amplified in the past 20 years. But America's ever rising obesity rates may play a more serious role in this rise than salt intake, the researchers said. The study's main message "is that for all the strong effort to get Americans to limit their salt intake, the evidence suggests that this has not happened," said Dr. David McCarron, lead author of an accompanying journal editorial.
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