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Dietary advice for reducing cardiovascular risk
1University College London Medical School, Department of Epidemiology and Public Health, 1-19 Torrington Place, London, UK, WC1E 6BT. e.brunner@ucl.ac.uk
The Cochrane Database of Systematic Reviews
|October 19, 2007
Summary
Dietary advice shows modest benefits for cardiovascular health in adults, improving diet and reducing risk factors like cholesterol and blood pressure. Longer-term effects of this nutritional guidance remain uncertain.
Area of Science:
- Nutrition Science
- Cardiovascular Health
- Public Health Interventions
Background:
- Population dietary changes can reduce chronic diseases like cardiovascular disease and cancer.
- The precise impact of dietary advice on sustained health improvements is not fully understood.
Purpose of the Study:
- To evaluate the effectiveness of dietary advice in promoting lasting dietary changes and improving cardiovascular risk profiles in healthy adults.
Main Methods:
- Systematic review of randomized controlled trials (RCTs) published up to November 2006.
- Searches included major databases (Cochrane, MEDLINE, EMBASE) and registries.
- Included RCTs involved healthy adults, lasted at least 3 months, and had minimal loss to follow-up.
Main Results:
- Dietary advice significantly reduced total and LDL cholesterol, systolic and diastolic blood pressure, and sodium excretion.
- Intake of fruits, vegetables, and dietary fiber increased, while total and saturated fat intake decreased.
- Modest improvements in plasma antioxidants were observed, though with significant heterogeneity.
Conclusions:
- Dietary advice is effective for modest, short-term improvements in diet and cardiovascular risk factors.
- The long-term efficacy of dietary interventions requires further investigation.
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