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Some omega-3 oils better than others for protection against liver disease
Date:2/5/2013

CORVALLIS, Ore. Research at Oregon State University has found that one particular omega-3 fatty acid has a powerful effect in preventing liver inflammation and fibrosis common problems that are steadily rising along with the number of Americans who are overweight.

The American Liver Foundation has estimated that about 25 percent of the nation's population, and 75 percent of those who are obese, have nonalcoholic fatty liver disease. This early-stage health condition can sometimes progress to more serious, even fatal diseases, including nonalcoholic steatohepatitis, or NASH, as well as cirrhosis and liver cancer.

The study, published online in the Journal of Nutrition, was one of the first to directly compare the effects of two of the omega-3 fatty acids often cited for their nutritional value, DHA and EPA.

In research with laboratory animals, it found that EPA had comparatively little effect on preventing the fibrosis, or scarring, that's associated with NASH. However, DHA supplementation reduced the proteins involved in liver fibrosis by more than 65 percent.

"A reduction of that magnitude in the actual scarring and damage to the liver is very important," said Donald Jump, a principal investigator with the Linus Pauling Institute at OSU and a professor in the College of Public Health and Human Sciences.

"Many clinical trials are being done with omega-3 fatty acids related to liver disease," Jump said. "Our studies may represent the first to specifically compare the capacity of EPA versus DHA to prevent NASH. It appears that DHA, which can also be converted to EPA in the human body, is one of the most valuable for this purpose."

The issues have taken center stage as the weight of Americans continues to rise, with a related increase in the incidence of fatty liver disease and liver damage.

NASH is a progressive form of liver disease that is associated with chronic inflammation and oxidative
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Contact: Donald Jump
Donald.jump@oregonstate.edu
541-737-4007
Oregon State University
Source:Eurekalert

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