So before I get into the new study I'll discuss today, I just wanted to encourage all my Canadian readers to spread the word that CBC Marketplace's inaccurate investigative coverage of the supplements industry (which aired in November 2015) has officially been retracted and tonight's Marketplace episode will explain why they are retracting the previous investigative report and where things went wrong.
It's important everyone knows this because many people's opinions of the industry and its products have been negative impacted due to false information. We need to correct this misconception in order encourage a vibrant industry where consumers continue to have access to healthy, and often life-saving products. Now as for the study at hand...
Here's another study showing benefits of omega-3s for teenagers. I like this study because it looked at a newer measure of omega-3 effectiveness known as the Omega-3 Index (a measure of the quantity of omega-3 fatty acids in the red blood cell membrane). In this study, the researchers used baseline data from Food2Learn, a double-blind and randomized placebo controlled krill oil supplementation trial in 13-15 year-old Dutch adolescents.
Blood samples were taken from 266 teens and used to calculate the Omega-3 Index, and cognitive performance was assessed using a battery of different tests. Results showed that the average Omega-3 Index was 3.83%.
“The Omega-3 Index (3.83%) in this sample was relatively low (well below the recommended range of 8%–11%),” wrote the researchers. “This could be due to the exclusion of participants with a high Omega-3 Index, although if these were included the mean was still only 3.89. The low Omega-3 Index in this sample is no surprise since 13.9% of the students did not consume any fish and 77% consumed fish rarely, as measured by the fish consumption questionnaire.”
Crunching the numbers showed that a higher Omega-3 Index was associated with higher scores on the LDST and fewer errors on the D2 test of attention, which measures selective attention. No associations were observed in the other seven cognitive measures, added the authors.
“The results of the supplementation study will further elucidate the effect of LCPUFA [long chain polyunsaturated fatty acids] supplementation on cognition,” they wrote. “If a positive effect of LCPUFA supplementation on cognition is shown, this could help improve cognitive functioning and possibly the school performance of adolescents in a relatively inexpensive and easy way.”
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Source: Association between Blood Omega-3 Index and Cognition in Typically Developing Dutch Adolescents
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