Your diet affects how hard your heart works. There’s no “one size fits all” plan for dilated cardiomyopathy (DCM), but thoughtful choices can reduce heart strain and support overall well-being. Tracking your weight, salt, and fluid intake gives your medical team important information to catch early changes and prevent problems.
Talk with your doctor to see what dietary changes may be right for you.
Monitoring Your Weight
Monitoring your weight daily is one of the most important habits for managing DCM. Sudden weight gain can indicate fluid retention and is a common sign that your heart may need more support, but it could also reflect other factors. Report any unusual changes to your medical team.
When to Act:
An increase of 2–3 pounds in a single day or 5 pounds in a week is a warning sign. Report these changes to your medical team immediately.
Tip: Trends matter more than individual numbers. Keep a log of daily readings and bring it to your regular checkups.
Managing Salt & Fluids
As DCM progresses, your heart may struggle to pump fluid effectively, leading to fluid retention. Monitoring salt and water intake is critical to reducing stress on your heart.
- Salt (Sodium) Intake: Eating too much salt can make your body hold extra fluid, putting more stress on your heart. Be mindful of “hidden” salt in processed, packaged, and restaurant foods. Your doctor may suggest a daily sodium limit and, if needed, prescribe medications like diuretics to help manage fluid.
- Fluid Intake: Some patients may need to limit how much they drink each day or take diuretics to remove excess fluid. Not everyone with DCM needs strict fluid restriction. Your doctor will guide what’s right for you.
Healthy Eating
Eating a well-balanced diet in the right amounts helps maintain your energy and supports healthy heart function. Focus on:
- Heart-Healthy Fats: Olive oil, avocados, nuts, and fatty fish (or alternative) for omega-3s.
- High-Fiber Foods: Whole grains, beans, and lentils to manage cholesterol and maintain energy.
- Fruits & Vegetables: A variety of colors provides potassium and magnesium for heart function.
- Lean Proteins: Poultry, fish, or plant-based proteins instead of red meats that are high in saturated fat.
Vitamins & Supplements
Keep an up-to-date list of all vitamins and herbal supplements and share it with your doctor. Some supplements, including certain herbal products, can affect heart rhythm or interact with certain medications.
Substance Use
Consumption of alcohol, marijuana, and other substances is strongly discouraged for DCM patients.
- Alcohol can be toxic to heart muscle cells and may further weaken a heart already affected by DCM.
- Marijuana can affect heart rate, blood pressure, and rhythm, and may interfere with your medications.
Ask Your Doctor
Every DCM case is unique. Consult your care team before making major dietary changes or starting any new supplements. They can provide guidance tailored to your heart’s current function and your individual needs.

Key Takeaways
Consult your care team before making changes.
Track weight daily; trends matter.
Monitor salt and fluid intake as advised.
Eat a heart-healthy, balanced diet.
Share any supplements with your doctor.
Avoid alcohol, marijuana, and other substances.