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Dietary Vitamins A, C, and Potassium Intake Is Associated With Narrower Retinal Venular Caliber
Ayaka Edo1, Diah Gemala Ibrahim2, Kazuyuki Hirooka1
1Department of Ophthalmology and Visual Science, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Frontiers in Medicine
|February 28, 2022
Summary
Higher intake of vitamins A, C, and potassium is associated with narrower retinal venules. This finding highlights the link between diet and microvascular health, observable through retinal vessel caliber.
Area of Science:
- Ophthalmology
- Nutrition Science
- Cardiovascular Health
Background:
- The retinal vasculature serves as a non-invasive window into systemic microvascular health.
- Dietary factors can influence microcirculation, making nutrient intake a key area of study.
- Understanding these links can offer insights into modifiable risk factors for vascular diseases.
Purpose of the Study:
- To investigate the association between dietary nutrient intake and retinal vessel caliber.
- To explore how specific nutrients may impact the microvasculature of the eye.
- To identify potential dietary strategies for maintaining vascular health.
Main Methods:
- A cross-sectional study of 584 Japanese descendants in Los Angeles.
- Dietary assessment, fundus photography for retinal vessel caliber measurement (central retinal artery and vein equivalents - CRAE and CRVE).
- Multivariate linear regression analysis adjusted for age, sex, and other cardiovascular risk factors.
Main Results:
- Higher intake of vitamin A was associated with narrower retinal venular caliber (CRVE).
- Increased intake of vitamin C showed a similar association with narrower CRVE.
- Greater potassium consumption was also linked to a narrower CRVE.
Conclusions:
- Significant associations exist between higher intakes of vitamins A, C, and potassium and narrower retinal venular caliber.
- Dietary nutrients play a role in modulating retinal microvasculature.
- These findings suggest potential dietary interventions for vascular health.
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