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Long-Chain Omega-3 Fatty Acid Intake Is Associated with Age but not Cognitive Performance in an Older Australian
A T Wade1, E Tregoweth, D Greaves
1Ashleigh E. Smith, Alliance for Research in Exercise Nutrition and Activity, Allied Health and Human Performance, University of South Australia, GPO Box 2471, Adelaide, South Australia 5001. Tel: +618 8302 1735.
The Journal of Nutrition, Health & Aging
|October 3, 2020
Summary
Older Australians
Area of Science:
- Nutrition Science
- Gerontology
- Cognitive Health
Background:
- Long-chain omega-3 polyunsaturated fatty acids (LCn-3 PUFA) are vital nutrients.
- Suboptimal LCn-3 PUFA intake is prevalent in Australia.
- These fatty acids may mitigate age-related cognitive decline.
Purpose of the Study:
- To assess LCn-3 PUFA intake in older Australians.
- To investigate the relationship between LCn-3 PUFA intake and cognitive function.
Main Methods:
- Cross-sectional study of 90 adults aged 50-80 years.
- LCn-3 PUFA intake assessed via food frequency questionnaire.
- Omega-3 Index (RBC n-3 index) determined from red blood cell fatty acid profiles.
- Cognitive function measured using Addenbrooke's Cognitive Examination-III.
Main Results:
- A positive association was found between age and RBC n-3 index.
- Age-related increase in LCn-3 PUFA intake was primarily from fish oil supplements.
- No significant association was observed between LCn-3 PUFA intake and cognitive function.
Conclusions:
- LCn-3 PUFA and fish oil consumption increase with age in older Australians, mainly through supplements.
- Despite increased intake, LCn-3 PUFA levels were not linked to cognitive function in this cohort.
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