# Nutrition in coronary heart disease
Eating patterns and heart health
In coronary heart disease, nutrition plays a central role in managing risk factors such as high blood pressure, cholesterol, and overweight. Research shows that certain eating patterns can influence the development and progression of the disease.
The Mediterranean diet is widely studied in connection with coronary heart disease.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Studies show that following this pattern – rich in vegetables, fruit, whole grains, fish, and olive oil – is associated with better outcomes. Research on adherence (maintaining it) indicates that patients who follow this pattern more closely are better able to manage their disease, although personal preferences and circumstances play a strong role here.
The DASH diet (Dietary Approaches to Stop Hypertension) focuses on blood pressure management.
ResearchediPositive results in clinical studies, not yet standard treatment
Recent research follows the connection between DASH eating at a younger age and the progression of calcium deposits in coronary arteries in middle age, suggesting that early dietary choices can have long-term effects.
Specific nutrients and minerals
**Zinc and heart-kidney function**
ResearchediPositive results in clinical studies, not yet standard treatment
Studies examine whether zinc deficiency is linked to the progression of heart and kidney problems, especially in combination with metabolic disorders. This topic is still under investigation; it does not mean that zinc is 'the answer', but rather that nutrition containing adequate zinc sources (such as nuts, seeds, fish) may be relevant.
**Metabolites and heart function**
ResearchediPositive results in clinical studies, not yet standard treatment
Blood tests show that certain metabolic products are associated with the risk of heart failure. This helps doctors better understand who is at extra risk, but does not yet provide direct dietary recommendations for the patient.
Nutrition and treatments
Many medications for coronary heart disease can interact with food. **Statins** (cholesterol-lowering drugs), for example, have different interactions:
- Grapefruit and grapefruit juice can make certain statins stronger in the blood; this requires caution with regular use.
- Some nutrients can affect the absorption of medications.
This is always something to discuss with your doctor or dietitian, especially if you eat a lot of certain foods or are considering supplements.
Weight management
Overweight worsens coronary heart disease and makes it more difficult to keep blood pressure and cholesterol in balance.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Gradual weight loss (through nutrition and exercise) leads to measurably better risk factors. This usually requires guidance from a dietitian, because generic 'diets' are rarely sustained for long.
Salt and blood pressure
ProveniIncluded in official guidelines, or approved by EMA or FDA
Reducing salt intake helps lower blood pressure, especially in people who are sensitive to salt. This does not happen drastically, but slowly and steadily. Most salt in food comes from processed products (bread, processed meats, ready-made meals) rather than from salt added at home.
Cholesterol and saturated fats
ProveniIncluded in official guidelines, or approved by EMA or FDA
Limiting saturated fats (found in many animal products and coconut oil) and avoiding trans fats helps lower cholesterol levels. Research shows that replacement with unsaturated fats (olive oil, fish, nuts) has a beneficial effect.
ResearchediPositive results in clinical studies, not yet standard treatment
The role of total cholesterol versus LDL (the 'bad' kind) is not entirely clear to everyone yet. For some people, only LDL cholesterol matters, for others other markers also play a role. Your doctor will determine this together with you.
Nutrition and inflammatory markers
Certain nutrients can influence inflammatory responses in the body.
ResearchediPositive results in clinical studies, not yet standard treatment
Studies look at whether inflammation markers in the blood (indicating heart disease) improve with certain eating patterns. This is still under investigation and is not the same for everyone.
Exercise and nutrition together
ProveniIncluded in official guidelines, or approved by EMA or FDA
Nutrition and physical activity work together. Research on cardiorespiratory fitness (how well the heart and lungs work together) shows that good nutrition and regular exercise reinforce each other in maintaining heart health.
Nutrition in metabolic disorders
Many patients with coronary artery disease also have diabetes, liver fat accumulation (MASLD), or metabolic disorders.
ResearchediPositive results in clinical studies, not yet standard treatment
Research suggests that these conditions reinforce each other, and nutritional choices matter not only for the heart but also for these conditions. This makes personalized guidance necessary.
When to see a dietitian
It is valuable to speak with a dietitian if you:
- Struggle with weight management
- Have no idea how to adjust your nutrition after diagnosis
- Take medications that may have interactions with food
- Have other conditions (diabetes, kidney problems) that nutrition also affects
- Want to know how to better align your nutrition with your treatment
A dietitian can create a plan that fits your situation, preferences, and treatment – something this general information cannot do.
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_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._