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Omega-3 fatty acids have long been touted as good for heart health, but their use as supplements hardly protects against heart disease, according to a new badysis.
The omega-3 supplements that they helped reduce triglyceride levels. But the other side of the coin was that they also reduced the levels of what is called the good cholesterol, HDL, according to the results published in the newspaper Cochrane Library .
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The results were not particularly surprising for the team that realized the # 39; s badysis.
"When I look at our discoveries, it's amazing how long we have been thinking about the effects of omega 3 fatty acids on heart and vascular health," said lead author Lee Hooper, a dietician and researcher at the Norwich Medical School of the University of East Anglia in the UK.
"The trials are very consistent.The highest quality tests published over several decades consistently show that there is little or no effect on heart disease, stroke or stroke. arrhythmia, "she said.
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Hooper and his colleagues looked at randomized controlled trial data that have followed patients from one to six years.
The badysis found an advantage of consuming canola oil and nuts, especially to prevent cardiac arrhythmias. But, Hooper said, the effects were low, for example, 143 people would need to increase their consumption of canola oil to prevent er a person to develop this heart disease, she said. And 1,000 people would need to increase their consumption of canola oil or nuts to prevent a person from dying from heart disease or a stroke or from a heart attack.
Even though the data do not demonstrate benefits for omega-3 heart attack and stroke prevention, Hooper is not ready to tell everyone to shed their pills.
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This is because "omega-3 supplements reduce triglycerides, and if they were prescribed Omega-3s – fish oil capsules take them, "she said. "For the rest of us, taking omega 3s will not protect our hearts.
Because the combined studies in the meta-badyzes tend to be heterogeneous, the results are not as strong as a single large study would be, says Dr. Zhaoping Li, professor of medicine and director of the Human Nutrition Center at the David Geffen School of Medicine at the University of California at Los Angeles, who was not involved in the study.
Studies are relatively short and it would be difficult to see a difference in the parameters such as heart attack, stroke and death. "I think the jury is still in terms of long-term benefits," said Li.
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In addition, "you can have people who consume diets very different in the studies, "noted Li. are more likely to have an impact in people who receive little omega-3 in their diet.
In the end, the study "does not change my practice," said Li.
Michael Blaha, who also did not participate in the badysis, said that he was simply confirming his previous opinions on omega 3 supplements.
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"I'm not too surprised by the results," said Blaha, director of clinical research at the Johns Hopkins Ciccarone Center. heart disease prevention in Baltimore, Maryland. "We have seen a trend toward negative results in studies of these supplements.And overall, there are not many reasons to supplement a healthy diet with over-the-counter products." [19659002] It's not that omega-3s are not important, says Blaha. "But the public health recommendation should be to get them through food rather than food supplements," he said. <! –
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