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Eating fish, nuts may not help thinking skills after all

Date:
September 25, 2013
Source:
American Academy of Neurology (AAN)
Summary:
Contrary to earlier studies, new research suggests that omega-3 fatty acids may not benefit thinking skills. Omega-3s are found in fatty fish such as salmon and in nuts.

Contrary to earlier studies, new research suggests that omega-3 fatty acids may not benefit thinking skills.
Credit: jonnysek / Fotolia

Contrary to earlier studies, new research suggests that omega-3 fatty acids may not benefit thinking skills. The study is published in the September 25, 2013, online issue of Neurology, the medical journal of the American Academy of Neurology. Omega-3s are found in fatty fish such as salmon and in nuts.

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"There has been a lot of interest in omega-3s as a way to prevent or delay cognitive decline, but unfortunately our study did not find a protective effect in older women. In addition, most randomized trials of omega-3 supplements have not found an effect," said study author Eric Ammann, MS, of the University of Iowa in Iowa City. "However, we do not recommend that people change their diet based on these results. Researchers continue to study the relationship between omega-3s and the health of the heart, blood vessels, and brain. We know that fish and nuts can be healthy alternatives to red meat and full-fat dairy products, which are high in saturated fats."

The study involved 2,157 women age 65 to 80 who were enrolled in the Women's Health Initiative clinical trials of hormone therapy. The women were given annual tests of thinking and memory skills for an average of six years. Blood tests were taken to measure the amount of omega-3s in the participants' blood before the start of the study.

The researchers found no difference between the women with high and low levels of omega-3s in the blood at the time of the first memory tests. There was also no difference between the two groups in how fast their thinking skills declined over time.


Story Source:

The above story is based on materials provided by American Academy of Neurology (AAN). Note: Materials may be edited for content and length.


Journal Reference:

  1. E. M. Ammann, J. V. Pottala, W. S. Harris, M. A. Espeland, R. Wallace, N. L. Denburg, R. M. Carnahan, J. G. Robinson. Omega-3 fatty acids and domain-specific cognitive aging: Secondary analyses of data from WHISCA. Neurology, 2013; DOI: 10.1212/WNL.0b013e3182a9584c

Cite This Page:

American Academy of Neurology (AAN). "Eating fish, nuts may not help thinking skills after all." ScienceDaily. ScienceDaily, 25 September 2013. <www.sciencedaily.com/releases/2013/09/130925185256.htm>.
American Academy of Neurology (AAN). (2013, September 25). Eating fish, nuts may not help thinking skills after all. ScienceDaily. Retrieved March 26, 2015 from www.sciencedaily.com/releases/2013/09/130925185256.htm
American Academy of Neurology (AAN). "Eating fish, nuts may not help thinking skills after all." ScienceDaily. www.sciencedaily.com/releases/2013/09/130925185256.htm (accessed March 26, 2015).

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