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Serum phospholipid docosahexaenonic acid is associated with cognitive functioning during middle adulthood
Matthew F Muldoon1, Christopher M Ryan, Lei Sheu
1Center for Clinical Pharmacology, University of Pittsburgh, Pittsburgh, PA 15260, USA. mfm10@pitt.edu
The Journal of Nutrition
|February 26, 2010
Summary
Higher intake of docosahexaenoic acid (DHA), an omega-3 fatty acid, is linked to better cognitive function in mid-life adults. This suggests DHA supports brain health across the lifespan.
Area of Science:
- Nutritional Neuroscience
- Biochemistry
- Cognitive Psychology
Background:
- Omega-3 polyunsaturated fatty acids (PUFAs) are linked to brain development and reduced cognitive decline.
- Mechanisms and specific omega-3 fatty acids involved in cognitive function remain unclear.
- Research is needed to understand the role of omega-3s in mid-life cognitive health.
Purpose of the Study:
- To investigate the association between serum phospholipid omega-3 fatty acids and cognitive function in mid-life adults.
- To determine which specific omega-3 fatty acids (ALA, EPA, DHA) are most relevant to cognitive performance.
- To explore the relationship between omega-3s and various cognitive domains.
Main Methods:
- 280 healthy community volunteers aged 35-54 without neuropsychiatric disorders or fish oil use.
- Measurement of serum phospholipid alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) using gas chromatography (GC).
- Assessment of five major cognitive dimensions using a comprehensive neuropsychological test battery.
Main Results:
- Higher serum DHA levels were significantly associated with better performance in nonverbal reasoning, mental flexibility, working memory, and vocabulary.
- These associations with DHA remained significant even after adjusting for education and vocabulary.
- Eicosapentaenoic acid (EPA) and alpha-linolenic acid (ALA) showed no significant associations with the tested cognitive functions.
Conclusions:
- Docosahexaenoic acid (DHA) is the key omega-3 fatty acid associated with cognitive performance in adults under 55.
- These findings highlight DHA's role in maintaining cognitive function throughout adulthood.
- Results may inform future clinical trials targeting neuropsychiatric disorders.
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