Heart Failure Diet: Sodium, Fluid, and Nutrition Guide

What to Eat with Heart Failure

• Low-sodium foods: sodium restriction is the most evidence-based dietary intervention for heart failure. Target under 2,000mg per day for most HF patients — lower than the general population recommendation of 2,300mg
• Lean proteins: chicken, fish, eggs, legumes — protein adequacy prevents cardiac cachexia (muscle wasting common in advanced HF)
• Potassium-rich foods if on a loop diuretic: furosemide (Lasix) depletes potassium — if you take a loop diuretic, potassium-rich foods are beneficial unless you also take spironolactone or an ACE inhibitor
• Mediterranean dietary pattern: AHA HF guidelines support Mediterranean eating for cardiovascular benefit

How Much Sodium with Heart Failure?

AHA heart failure guidelines recommend under 2,000mg of sodium per day for people with symptomatic heart failure (NYHA Class II-IV). Sodium causes fluid retention — even a single high-sodium meal can cause enough fluid accumulation to worsen breathlessness and require emergency diuresis. The 2,000mg target is stricter than general hypertension guidelines (2,300mg) because of the direct relationship between sodium intake and acute decompensation in HF.

What to Avoid with Heart Failure

• High-sodium foods: canned soups, processed meats, fast food, frozen dinners — the primary sodium sources in the average diet that must be rigorously controlled in HF
• Alcohol: alcohol is directly cardiotoxic and is a common cause of heart failure (alcoholic cardiomyopathy) — AHA recommends abstinence or strict limitation for HF patients
• Excessive fluid: fluid restriction varies — not all HF patients require strict fluid limits, but those with significant fluid retention may be limited to 1.5-2 liters per day including all fluid from food sources
• Licorice root: causes sodium and water retention, directly worsening fluid overload
• High-fat meals: large fatty meals cause acute hemodynamic stress in the setting of reduced cardiac function

Do I Need to Restrict Fluid with Heart Failure?

Fluid restriction is not universally required for all heart failure patients — it is individualized based on severity, medications, and serum sodium levels. AHA 2024 HF guidelines note that routine fluid restriction is not supported for stable compensated HF patients on optimal diuretic therapy. For patients with recurrent decompensation, hyponatremia, or severe HF, fluid limits of 1.5-2 liters per day are commonly used. Your target comes from your cardiologist based on your specific HF stage and sodium levels.

Heart Failure Medications and Diet

Most HF patients take multiple medications with dietary implications. Loop diuretics (furosemide, bumetanide) deplete potassium and sodium — potassium-rich foods may be beneficial unless you also take an ACE inhibitor, ARB, or spironolactone. ACE inhibitors and ARBs raise potassium — high-potassium foods require monitoring. Spironolactone retains potassium — salt substitutes are absolutely contraindicated. Digoxin is affected by high-fiber meals which reduce its absorption — take digoxin consistently relative to meals and avoid sudden large changes in fiber intake.