| Autor: |
Billy R. Hammond, L. Stephen Miller, Medina O. Bello, Cutter A. Lindbergh, Catherine Mewborn, Lisa M. Renzi-Hammond |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Frontiers in Aging Neuroscience, Vol 9 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
1663-4365 |
| DOI: |
10.3389/fnagi.2017.00254 |
| Popis: |
Background: High levels of xanthophyll carotenoids lutein (L) and zeaxanthin (Z) in the central nervous system have been previously correlated with improved cognitive function in community-dwelling older adults. In this study, we tested the effects of supplementing L and Z on older men and women with a range of baseline cognitive abilities.Objective: The purpose of this study was to determine whether or not supplementation with L+Z could improve cognitive function in community-dwelling, older adults.Design: Double-masked, randomized, placebo-controlled trial. A total of 62 older adults were randomized into groups receiving either 12 mg L+Z or a visually identical placebo. Data from 51 participants (M = 73.7 years) were available for analysis. Retinal L+Z levels (macular pigment optical density, MPOD) were measured psychophysically using heterochromatic flicker photometry as a biomarker of cortical L+Z levels. Cognitive function was measured using the CNS Vital Signs computerized test platform.Results: Participants receiving the active L+Z supplement had statistically significant increases in MPOD (p < 0.03) and improvements in complex attention (p < 0.02) and cognitive flexibility domains (p < 0.04), relative to participants taking the placebo. A trend was also seen for the executive function domain (p = 0.073). In male participants only, supplementation yielded improved composite memory (p = 0.04).Conclusions: Supplementation with L+Z improved cognitive function in community-dwelling, older men and women. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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