# Nutrition in chronic heart failure
Fluid intake and salt restriction
In chronic heart failure, fluid buildup in the body plays a central role. The heart cannot pump blood effectively, which can cause fluid to accumulate in the lungs, legs, and abdomen. Salt binds fluid in the body, so lower salt intake helps prevent fluid buildup.
ProveniIncluded in official guidelines, or approved by EMA or FDA
A low-salt eating pattern is generally recommended for heart failure. This does not mean eating completely salt-free, but rather avoiding large amounts of salt from cured meats, cheese, bread, ready-made meals, and sauces. Home-cooked meals give you more control over salt content than industrially prepared products.
Fluid intake can also be a point of attention, especially in severe stages. In some phases of heart failure, limiting very large fluid intakes is recommended, but this varies greatly from person to person and at different points in the disease progression. Always decide this together with your doctor or dietitian.
Potassium and medications
Certain heart failure medications — especially ACE inhibitors and some other classes — can cause potassium to build up in the body. This can be dangerous for heart rhythm. Food contains a lot of potassium: bananas, dried fruit, potatoes, spinach, tomatoes, and nuts are rich sources.
ProveniIncluded in official guidelines, or approved by EMA or FDA
If you take medications that can raise potassium levels, your care team will monitor this carefully with blood tests. Depending on your potassium level, a dietitian may advise you to eat certain foods less frequently or in smaller amounts. This is very individual and changes with your medication and blood values.
This is *not* the same as avoiding potassium altogether — potassium is essential for heart and muscle function. It is about conscious consideration. Always discuss this with your care team or dietitian; changing your diet on your own because of medications can carry risks.
Protein intake
In heart failure, muscle mass can decrease, especially in advanced stages. This phenomenon is called cachexia and increases infection and mortality risk. Adequate protein in the diet helps maintain muscle strength.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Protein sources are meat, fish, eggs, dairy products, legumes, nuts, and seeds. With heart failure, it is important to eat well — malnutrition weakens the body and heart further. A dietitian can help set up an eating pattern that is both low in salt, well-balanced, and adequate in energy and protein.
Fats and omega-3
Fat choices can be relevant for heart health. Research on omega-3 fatty acids (from fatty fish and certain plant-based oils) shows mixed results specifically in heart failure.
ResearchediPositive results in clinical studies, not yet standard treatment
Fatty fish such as salmon, mackerel, and herring contain a lot of omega-3 and is recommended in many guidelines for heart health in general. In heart failure, the precise role of supplementation (extra pills) is less clear. A healthy pattern with mainly unsaturated fats (olive oil, nuts, fish) and less saturated fat (red meat, butter) aligns with what is known about heart health.
Alcohol
Alcohol can disrupt heart rhythm and may have played a role in the development of certain forms of heart failure. Excessive alcohol use also increases the strain on the heart and liver.
ProveniIncluded in official guidelines, or approved by EMA or FDA
In heart failure, moderate alcohol use is recommended. For some, complete abstinence applies. This depends on the cause of your heart failure, your current condition, and your medication. Discuss with your care team what is appropriate for you.
Sugars and weight
Overweight and obesity increase the risk of heart failure and complicate existing heart failure. Recent research also shows that metabolic disorders (including unfavorable glucose levels and insulin resistance) are associated with heart failure and kidney damage.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Achieving and maintaining a healthy body weight helps reduce the strain on the heart. This often requires sustainable dietary changes, not strict diets. A dietitian can help create a customized plan. The focus is on eating regularly, consuming plenty of vegetables and fruit, and reducing refined sugars and sugary drinks.
Energy intake and nutritional status
In severe heart failure, patients may lose weight and become malnourished, despite adequate food intake — this is called cardiac cachexia. At the same time, you need to avoid fluid buildup. This is a delicate balance.
ProveniIncluded in official guidelines, or approved by EMA or FDA
In this situation, good nutritional management is essential. High-nutrient food in smaller portions (nutritional drinks, nourishing sandwiches, cheese, nuts) can help without excessive fluid buildup. This requires individual advice from your treatment team.
Zinc and micronutrients
Recent research suggests that low blood zinc levels may be associated with heart failure progression. Zinc is found in meat, shellfish, grains, and legumes.
ResearchediPositive results in clinical studies, not yet standard treatment
There is insufficient evidence to advise against zinc-rich foods or to truly recommend supplementation for heart failure. A balanced diet with plenty of vegetables, grains, and protein sources usually provides sufficient micronutrients. Taking supplements without medical advice is not recommended, especially since some supplements can interact with heart medications.
Food and medications
Certain heart failure medications are better taken on an empty stomach or with food. Some foods can also affect how medications work.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Always ask your pharmacist or healthcare provider how best to take your medications in relation to meals. This is explained when prescribed, but it helps to be aware of this.
Practical approach
Managing diet with heart failure often requires adjustments that seem contradictory: low fluid, low salt, energy-rich, and protein-sufficient all at once. This is difficult to figure out on your own.
ProveniIncluded in official guidelines, or approved by EMA or FDA
A dietitian specializing in heart failure can create a customized plan that fits your medication, blood values, preferences, and family situation. This is often arranged through your cardiologist and may be part of heart failure programs. Regular contact with your doctor helps: if you develop fluid buildup, your appetite decreases, or your weight changes significantly, these are signals for adjustments.
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_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._