Featured Research

from universities, journals, and other organizations

Too much salt may damage blood vessels and lead to high blood pressure

Date:
June 18, 2012
Source:
American Heart Association
Summary:
Eating a high-salt diet for several years is associated with markers of blood vessel damage. People who have markers of blood vessel damage and eat a high-salt diet are more likely to develop high blood pressure; Therefore, the impact of a high-salt diet is greater on this group of people.

Eating a high-salt diet for several years may damage blood vessels -- increasing your risk of developing high blood pressure, according to research reported in the American Heart Association journal Circulation.

People with this type of blood vessel damage who eat a high-salt diet are more likely to develop hypertension, or high blood pressure . This research hints at the presence of a "sodium amplification loop" in which eating too much salt for a long time damages blood vessels, leading to a greater chance of developing high blood pressure if the high-salt diet is continued.

Researchers didn't assess the cause-and-effect relationship between salt intake and high blood pressure. But the study's results "add to the considerable evidence that a diet heavy on salt is closely linked to high blood pressure," said John Forman, M.D., lead author of the study and a nephrologist at Brigham and Women's Hospital and Harvard Medical School in Boston, Mass.

"In addition, this study reinforces guidelines backed by the American Heart Association and other professional organizations that recommend reducing salt consumption to minimize the risk of developing high blood pressure," Forman said.

One gram of sodium is equal to 2.5 grams of table salt (sodium chloride).

Researchers conducted an observational study (PREVEND) in which they tracked the sodium intake of 5,556 men and women from the general population of Groningen, Netherlands. Sodium intake was assessed by collecting multiple 24-hour urine samples, which is considered the optimal method to measure sodium intake.

Researchers analyzed the association between sodium consumption and blood levels of uric acid and albumin in the urine -- both markers of blood vessel damage -- in participants not taking high blood pressure medicine.

During a median follow-up of 6.4 years, 878 new hypertension diagnoses were made.

Higher sodium intake was associated with increasing levels of uric acid and albumin over time. The higher the levels of these markers, the greater the risk of developing hypertension if dietary salt intake was high, researchers found. Compared with participants eating the least amount of sodium (about 2,200 milligrams a day), those eating the most (about 6,200 mg/d) were 21 percent more likely to develop high blood pressure. However, those who had high uric acid levels and ate the most salt were 32 percent more likely to develop high blood pressure while those with high urine albumin levels and highest salt intake were 86 percent more likely to develop high blood pressure.

A high-salt diet is believed to be responsible for 20 percent to 40 percent of all cases of high blood pressure in the United States.

Because the study involved only European Caucasians, the results should be replicated in Hispanics, African-Americans and others in the United States; however, other researchers have found a link between a high-salt diet and high blood pressure in these other populations, Forman said.

Co-authors are Lieneke Scheven, M.D.; Paul de Jong, M.D.; Stephan Bakker, Ph.D.; Gary Curhan, M.D.; and Ron Gansevoort, M.D.

The American Heart Association, the National Institute of Diabetes, Digestive and Kidney Disease, and the Dutch Kidney Foundation funded the study.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Journal Reference:

  1. J. P. Forman, L. Scheven, P. E. de Jong, S. J. L. Bakker, G. C. Curhan, R. T. Gansevoort. Association between Sodium Intake and Change in Uric Acid, Urine Albumin Excretion, and the Risk of Developing Hypertension. Circulation, 2012; DOI: 10.1161/CIRCULATIONAHA.112.096115

Cite This Page:

American Heart Association. "Too much salt may damage blood vessels and lead to high blood pressure." ScienceDaily. ScienceDaily, 18 June 2012. <www.sciencedaily.com/releases/2012/06/120618161714.htm>.
American Heart Association. (2012, June 18). Too much salt may damage blood vessels and lead to high blood pressure. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2012/06/120618161714.htm
American Heart Association. "Too much salt may damage blood vessels and lead to high blood pressure." ScienceDaily. www.sciencedaily.com/releases/2012/06/120618161714.htm (accessed August 20, 2014).

Share This




More Health & Medicine News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: World's Oldest Man Lives in Japan

Raw: World's Oldest Man Lives in Japan

AP (Aug. 20, 2014) A 111-year-old Japanese was certified as the world's oldest man by Guinness World Records on Wednesday. Sakari Momoi, a native of Fukushima in northern Japan, was given a certificate at a hospital in Tokyo. (Aug. 20) Video provided by AP
Powered by NewsLook.com
Ebola-Hit Sierra Leone's Freetown a City on Edge

Ebola-Hit Sierra Leone's Freetown a City on Edge

AFP (Aug. 19, 2014) Residents of Sierra Leone's capital voice their fears as the Ebola virus sweeps through west Africa. Duration: 00:56 Video provided by AFP
Powered by NewsLook.com
101-Year-Old Working Man Has All The Advice You Need

101-Year-Old Working Man Has All The Advice You Need

Newsy (Aug. 19, 2014) Herman Goldman has worked at the same lighting store for almost 75 years. Find out his secrets to a happy, productive life. Video provided by Newsy
Powered by NewsLook.com
Researcher Testing on-Field Concussion Scanners

Researcher Testing on-Field Concussion Scanners

AP (Aug. 19, 2014) Four Texas high school football programs are trying out an experimental system designed to diagnose concussions on the field. The technology is in response to growing concern over head trauma in America's most watched sport. (Aug. 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins