Nutrition for a Healthy Heart: Diets, Foods, and Important Recommendations

Cardiovascular diseases (CVD) remain one of the leading causes of death worldwide. However, many of them can be prevented or their development significantly slowed down by changing lifestyle, in which proper nutrition plays a key role. Diet has a direct impact on such risk factors as cholesterol levels, blood pressure, weight, and general inflammation in the body. Understanding the principles of a heart-healthy diet is an investment in your longevity and quality of life.

Basic Principles of a Heart-Healthy Diet

The nutritional approach aimed at maintaining heart health often focuses not so much on strict restrictions, but on including certain food groups in the diet. One such approach is the PURE (Prospective Urban Rural Epidemiology) diet, which has proven effective in reducing the risk of premature coronary artery disease (CAD) [1]. This diet emphasizes the consumption of the following foods:

• Fruits and vegetables: rich in vitamins, minerals, and antioxidants.
• Legumes: a source of plant-based protein and fiber.
• Nuts: contain healthy fats, protein, and trace elements.
• Fish: especially fatty varieties rich in omega-3 fatty acids.
• Dairy products: preferably low-fat or moderate-fat [1].

Studies have shown that stricter adherence to the principles of the PURE diet is associated with a significant reduction in the risk of early development of CAD [1]. This approach may be more acceptable in various cultural contexts because it focuses on adding healthy foods rather than rigid prohibitions [1].

Another well-studied and recommended diet is DASH (Dietary Approaches to Stop Hypertension), which has proven its benefits, especially for patients with heart failure (HF) [3]. Although the Mediterranean diet is also popular, there is currently insufficient convincing evidence of its effectiveness for HF patients compared to DASH [3].

Important aspects of a heart-healthy diet also include:

• Moderate salt restriction: studies show that a moderate reduction in salt intake is more effective than strict restrictions [3].
• Smoking cessation and moderate alcohol consumption: although direct clinical studies on these aspects for HF patients are insufficient, general recommendations emphasize the importance of quitting smoking and avoiding excessive alcohol consumption [3].

Heart-Healthy Foods

In addition to general dietary approaches, there are individual foods that can bring significant benefits to the cardiovascular system:

• Garlic: regular consumption of garlic (approximately 0.5-1 clove per day) can lower cholesterol levels by about 9% [2]. This is a simple and affordable way to support vascular health.
• Nitrate-rich foods: certain plant extracts, such as from amaranth leaves (Oxystorm), rich in nitrates, as well as curcuminoids from turmeric, show promising therapeutic potential in experimental models of myocardial infarction in rats [4]. This area is actively researched and may lead to the creation of new food supplements for heart health.

Including a variety of fruits, vegetables, whole grains, lean proteins, and healthy fats in the diet is the basis for maintaining optimal cardiovascular function.

Cholesterol and Fat Management

High levels of cholesterol and other lipids in the blood are one of the key risk factors for the development of cardiovascular diseases. Studies in animal models have shown that a high-fat diet significantly worsens myocardial damage during infarction, leading to increased levels of triglycerides, total cholesterol, low-density lipoproteins (LDL), as well as enzymes indicating heart damage [8]. At the same time, treatment with statins (e.g., atorvastatin) can mitigate these negative effects [8].

An important role is also played by the adipose tissue located around the heart, known as epicardial adipose tissue (EAT). This tissue is metabolically active and may be associated with the risk of cardiovascular diseases, including acute myocardial infarction [7]. Weight management and reduction of total visceral fat, including EAT, is an important strategy for the prevention and treatment of CVD.

To maintain healthy cholesterol levels, it is recommended to:

• Limit the intake of saturated and trans fats found in red meat, full-fat dairy products, fried foods, and processed foods.
• Prioritize unsaturated fats found in fish, avocados, nuts, seeds, and vegetable oils (olive, canola).
• Increase fiber intake, which helps bind cholesterol and remove it from the body.

Special Aspects: Children and the Elderly

Heart Health from Childhood

The roots of cardiovascular diseases are often laid down in childhood [6]. Therefore, it is extremely important to start caring for heart health from an early age. National guidelines call for regular assessment of risk factors, such as obesity and hypertension, as part of a pediatric examination [6]. A comprehensive approach to preserving cardiovascular health in children includes:

• Balanced nutrition: forming healthy eating habits from an early age.
• Physical activity: a sufficient level of daily activity.
• Screen time control: limiting the time spent in front of screens.
• Full sleep: ensuring a sufficient amount and quality of sleep.
• Avoiding tobacco smoke exposure: protecting children from passive smoking [6].

Regular monitoring of body mass index (BMI), blood pressure, cholesterol, and glucose levels allows timely identification and correction of potential risks [6].

Nutrition in Heart Failure for the Elderly

Elderly patients with chronic heart failure (CHF) are at high risk of malnutrition and sarcopenia (loss of muscle mass) [5]. These conditions significantly worsen the prognosis and quality of life. Therefore, for this group of patients, the following are especially important:

• Nutritional status screening and assessment: regular checking for signs of malnutrition.
• Individualized nutritional management: developing a nutrition plan that provides a sufficient amount of calories, protein, and microelements, taking into account HF-related restrictions (e.g., moderate fluid and salt restriction) [5].

A study showed that up to 30.33% of elderly patients with CHF suffer from sarcopenia, and the prevalence of malnutrition among them is significantly higher [5]. This emphasizes the critical importance of a comprehensive approach to nutrition in this vulnerable group.

Conclusion

Proper nutrition plays a fundamental role in the prevention and management of cardiovascular diseases throughout life. From choosing a diet rich in fruits, vegetables, legumes, nuts, and fish, to controlling cholesterol levels and considering the specific needs of children and the elderly – every aspect matters. Integrating these principles into daily life is a powerful tool for maintaining heart health and improving overall well-being.

Sources

1. The correlation between PURE healthy diet and premature coronary artery disease: Iran premature coronary artery disease (IPAD) study.
2. Cardiovascular disease.
3. Lifestyle Modification in Heart Failure Management: Are We Using Evidence-Based Recommendations in Real World Practice?
4. Assessment of cardioprotective activity of a nitrate enriched food-based polyherbal formulation using experimental myocardial infarction in rats.
5. Study on nutritional status and incidence of sarcopenia in elderly patients with chronic heart failure.
6. Preserving Optimal Cardiovascular Health in Children.
7. An association between epicardial adipose tissue and prognosis in acute myocardial infarction: a systematic review and meta-analysis.
8. Effect of blood lipid on myocardial injury in rats with myocardial infarction.

Disclaimer: The information provided in the article is for informational purposes only and cannot replace professional medical advice. Always consult a specialist before changing your diet or starting any treatment.