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Omega-3 Fatty Acids Increase Gray Matter In The Human Brain
A Life Priority perspective on health, habits, and the choices that shape how well we keep showing up.
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Fighting the Blahs: DHA€ˆand€ˆEPA - Omega-3 Fatty Acids Which Increase Gray Matter in Human Brain Areas That Regulate Emotions
The Durk Pearson & Sandy Shaw®
Life Extension NewsTM
Volume 17 No. 7 €¢ August 2014
Decreases in the brain’s gray matter takes place in various areas during aging. These decreases are associated with cognitive decline. A 2007 paper1 reported the results of an examination via magnetic resonance imaging of gray matter volume in 55 middle aged male and female subjects (mean age = 44.7) and related the decreased gray matter to the dietary intake of long chain omega-3 fatty acids (DHA and EPA). The subjects were divided into three groups based on long chain omega-3 intake: low 0-20 mg/day, n=16; medium (25-70 mg/day, n=21; and high 80-1600 mg/day, n=18.
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Deficiency of long chain omega-3 fatty acids has been associated with increased circulating levels of glucocorticoids, which the authors attribute to HPA (hypothalamic-pituitary axis) hyperactivity.
The results showed that a higher intake of the long chain omega-3 fatty acids was associated with increased gray matter volume in the subgenual ACC (anterior cingulate cortex) and in an overlapping region of the right amygdala and right hippocampus, areas important for emotion arousal and regulation.
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The authors cautioned that the study included only a small number of subjects and that the intake of EPA and DHA was estimated from dietary recall rather than actual measurements of blood fatty acid composition. Nevertheless, the data are consistent with animal studies in which DHA supplementation, for example, has been shown to increase neurite growth and c-Fos containing neurons (indicating neuronal activity) in the hippocampal CA1 field of the rat brain.
Reference
- Conklin, Gianaros, Brown, et al. Long-chain omega-3 fatty acid intake is associated positively with corticolimbic gray matter volume in healthy adults. Neurosci Lett.421:209-12 (2007).
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