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Vitamin E and coronary artery disease.
A P Spencer1, D S Carson, M A Crouch
1Medical University of South Carolina, Charleston 29425, USA.
Archives of Internal Medicine
|July 1, 1999
Summary
Vitamin E shows potential antioxidant effects for coronary artery disease (CAD) prevention and treatment. However, evidence is mixed, suggesting careful consideration of dosage and individual patient factors for supplementation.
Area of Science:
- Cardiovascular Medicine
- Nutritional Science
- Oxidative Stress Research
Background:
- Vitamin E's antioxidant properties are investigated for coronary artery disease (CAD).
- In vitro studies show vitamin E protects low-density lipoprotein (LDL) from oxidation.
- Observational studies suggest a link between vitamin E levels and CAD risk.
Purpose of the Study:
- To evaluate the role of vitamin E in CAD prevention and treatment.
- To analyze conflicting data regarding vitamin E supplementation's cardiovascular benefits.
- To provide guidance on vitamin E intake for patients with or at risk of CAD.
Main Methods:
- Review of in vitro, observational, epidemiological, and randomized controlled trial data.
- Analysis of studies using varying vitamin E dosages (50-800 IU/d).
- Assessment of vitamin E's effects on angina, myocardial infarction, and cardiovascular death.
Main Results:
- Some studies suggest vitamin E reduces angina risk (low dose) and cardiovascular events (high dose).
- Conflicting data exists, with some studies showing no benefit or potential harm (e.g., with beta carotene).
- Dietary vitamin E from fruits and vegetables is recommended.
Conclusions:
- Supplemental vitamin E may be considered for high-risk or diagnosed CAD patients, balancing benefits against risks.
- Recommended supplemental dosages range from 100-400 IU/d, with higher doses for established CAD.
- Further research is needed to clarify optimal vitamin E supplementation strategies for CAD.