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Eating salmon once a week




Eating salmon or other fatty fish just once a week helped reduce men's risk of heart failure, adding to growing evidence that omega-3 fatty acids are of benefit to cardiac health. Led by scientists at Beth Israel Deaconess Medical Center (BIDMC) and reported in today's on-line issue of the European Heart Journal, the findings represent one of the largest studies to investigate the association.



Eating salmon once a week

"Prior research has demonstrated that fatty fish and omega-3 fatty acids help to combat risk factors for a range of heart-related conditions, such as lowering triglycerides [fats in the blood] reducing blood pressure, heart rate and heart rate variability," explains first author Emily Levitan, PhD, a research fellow in the Cardiovascular Epidemiology Research Center at BIDMC. "Collectively, this may explain the association with the reduced risk of heart failure found in our study".

A life-threatening condition that develops when the heart can no longer pump enough blood to meet the body's needs, heart failure (also known as congestive heart failure) is commonly caused by existing cardiac conditions, including hypertension and coronary artery disease. Typically heart failure is the leading cause of hospitalization among patients 65 and older, and is characterized by such symptoms as fatigue and weakness, difficulty walking, rapid or irregular heartbeat, and persistent cough or wheezing.

The scientists followed 39,367 Swedish men between the ages of 45 and 79 from 1998 to 2004. The scientists recorded details of the men's diet and tracked the men's outcome through Swedish inpatient hospital registers and cause-of-death registers. During this period, 597 men in the study (with no prior history of heart disease or diabetes) developed heart failure. Thirty-four men died.

Analysis of their numbers showed that the men who ate fatty fish (herring, mackerel, salmon, whitefish and char) once a week were 12 percent less likely to develop heart failure, compared with men who ate no fatty fish. Eventhough this association did not reach statistical significance, notes Levitan, the scientists also found a statistically significant association with the intake of marine omega-3 fatty acids, which are found in cod liver and other fish oils: The men who consumed approximately 0.36 grams a day were 33 percent less likely to develop heart failure than the men who consumed little or no marine omega-3 fatty acids.

"We divided the men into five groups based on their intake of fatty fish," explains Levitan. "The first group consumed little or no fatty fish; at the other end of the spectrum, the fifth group consumed significant quantitities, three or more servings per week. We observed that while the 'middle group' who ate one serving per week had a 12 percent reduced risk of heart failure, the next two groups, who ate either two servings a week or three or more servings a week, had nearly the same heart failure risk as the men who ate no fish at all".

The findings were similar when the scientists looked at fish oil consumption: Among five groups based on fish oil consumption, the middle group, who consumed 0.36 grams per day of omega-3 fatty acids showed a 33 percent reduced risk of heart failure, while the men who consumer greater quantities (approximately 0.46 grams per day or 0.71 grams per day) had a risk of heart failure similar to the men who consumed little or no fish oils.

"The higher rates of heart failure in men who consumed the most fatty fish or marine omega-3 fatty acids compared with the men who had moderate consumption appears to be due to chance," explains Levitan. Alternatively, she explains, the men who ate more fish may already be in poor health, and appears to be trying to improve their health through fish consumption.

"Our study reinforces the current recommendations for moderate consumption of fatty fish," notes Levitan. "Current guidelines from the American Heart Association recommend eating fatty fish twice a week. It will be important, going forward, to replicate these findings in other populations, especially those including women, as our study looked at men only".


Posted by: Daniel    Source




Did you know?
Eating salmon or other fatty fish just once a week helped reduce men's risk of heart failure, adding to growing evidence that omega-3 fatty acids are of benefit to cardiac health. Led by scientists at Beth Israel Deaconess Medical Center (BIDMC) and reported in today's on-line issue of the European Heart Journal, the findings represent one of the largest studies to investigate the association.

Medicineworld.org: Eating salmon once a week

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