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健康資訊

 
 
科學研究測試Omega-3證實有助腦部推動 Omega-3 brain boost confirmed

Thanks to nationwide charities like the British Heart Foundation, the benefits of omega-3 fatty acids found in fish oils are already well known in terms of how they help protect the heart. But the results of studies recently published in the November 2007 issue of the American Journal of Clinical Nutrition should leave scientists and other experts in no doubt about the effects that fish-sourced omega-3 fatty acids have on the brain.

Three studies carried out in different parts of the world ? New Zealand, Norway and the Netherlands ? suggest that the omega-3 fatty acids found in fish (one of which is eicosapentaenoic acid, or EPA) help boost cognitive health in a number of ways.

The New Zealand study (i), carried out by researchers at the University of Otago, analysed data taken from health questionnaires and blood samples linked to the National Nutrition Survey, which involved more than 2,000 people. They discovered that the ratio of EPA to arachidonic acid (or AA, an omega-6 fatty acid) in the blood was positively linked to mental wellbeing.

Oxford University scientists, on the other hand, studied more than 2,000 elderly Norwegians, and specifically the relationship between cognitive performance and seafood consumption (ii). In cognitive performance tests, those who ate at least 10g of fish a day performed significantly better than those who ate less. Those who ate the most - up to 75g a day - got the best test results.

Meanwhile, Dutch scientists from Wageningen University used data from a trial that involved 807 men and women in their 60s (iii). The researchers found that those with increased blood levels of omega-3 fatty acids had not declined in terms of certain speed-related cognitive skills over the three-year trial period as much others who had lower omega-3 blood levels.

In an independent editorial in the same issue, Tufts University expert Irwin Rosenberg commended the trials? findings: "These recent reports are novel in that they address the association of omega-3 fatty acid intake and cognitive function in non-demented individuals and, thus, present a shift in the attention to earlier stages of cognitive decline with the hope of preventing progression to states of dementia and disability before they become irreversible," he said.

How EPA boosts the brain
Neurological experts are indeed beginning to realise how important fatty acids are for cognitive health. Even the Alzheimer's Society recommends eating a portion of oily fish at least once a week to help prevent the inflammation in the brain associated with dementia.

Igennus' range of clinical-grade omega fatty acid suppements contain ultra-pure EPA (eicosapentaenoic acid) from marine fish oil and GLA (gamma-linolenic acid) from organic virgin evening primrose oil, providing a highly concentrated source of omega-3 & omega-6 long-chain fatty acids and botanical triterpenes.

Omega product is a unique combination of natural fatty acids, providing cell membranes with the nutrients required for efficient chemical signalling, integral to healthy brain function. Just two capsules daily provides 560 mg EPA and 200 mg organic EPO, helping to reverse fatty acid deficiencies by nourishing the brain's phospholipids. An increasing number of doctors and nutrition experts are using our premium supplements for a variety of conditions including depression, anxiety, M.E., schizophrenia, ADHD and skin conditions.

References:

(i) F Crowe, C Skeaff, T Green, A Gray. "Serum phospholipid n-3 long-chain polyunsaturated fatty acids and physical and mental health in a population-based survey of New Zealand adolescents and adults." American Journal of Clinical Nutrition Volume 86, Pages 1278-1285

(ii) E Nurk, C Drevon, H Refsum, K Solvoll, S Vollset, O Nygard, H Nygaard, K Engedal, G Tell, A Smith. "Cognitive performance among the elderly and dietary fish intake: the Hordaland Health Study." American Journal of Clinical Nutrition Volume 86, Pages 1470-1478

(iii) C Dullemeijer, J Durga, I Brouwer, O van de Rest, F Kok, R M Brummer, M van Boxtel, P Verhoef. "N-3 Fatty acid proportions in plasma and cognitive performance in older adults." American Journal of Clinical Nutrition Volume 86, Pages 1479-1485