Alcohol intake and brain structure in a multiethnic elderly cohort

Area of Science:

• Neuroimaging
• Gerontology
• Nutritional Neuroscience

Background:

• Existing evidence links light-to-moderate alcohol intake to reduced dementia risk and better cardiovascular health.
• Minimal data exists on alcohol's association with specific brain magnetic resonance imaging (MRI) markers.
• This study investigates the relationship between alcohol consumption and brain structure in older adults.

Purpose of the Study:

• To examine the association between alcohol intake and brain structure using MRI.
• To assess how different types of alcohol (wine, beer, liquor) relate to brain imaging markers.
• To explore potential benefits of light-to-moderate alcohol consumption on brain aging.

Main Methods:

• Cross-sectional study of 589 multi-ethnic community residents aged 65+.
• High-resolution structural MRI collected to measure total brain volume (TBV), white matter hyperintensity volume (WMHV), and infarcts.
• Alcohol intake assessed via food frequency questionnaire; regression models adjusted for covariates.

Main Results:

• Light-to-moderate total alcohol or wine intake, but not beer or liquor, was associated with larger TBV compared to non-drinking.
• A dose-response relationship was observed between alcohol or wine intake and TBV.
• No significant association found between alcohol intake and WMHV or brain infarcts.

Conclusions:

• Light-to-moderate alcohol consumption, particularly wine, is associated with larger total brain volume in community-dwelling older adults.
• These findings suggest a potential neuroprotective effect of moderate alcohol intake on brain aging.
• Replication of these findings in further studies is warranted to confirm the benefits.