Foods for Atrial Fibrillation: What to Eat and What to Avoid

When you have atrial fibrillation, an irregular and often rapid heart rhythm that can increase stroke risk. Also known as AFib, it’s not just about pills — what you eat plays a real role in how often your heart misfires. Many people think AFib is only managed with medication, but diet changes can stabilize your rhythm, lower blood pressure, and reduce inflammation that triggers episodes.

Potassium, a mineral that helps regulate heart muscle contractions is critical. Bananas, sweet potatoes, spinach, and avocado are simple, everyday sources. Low potassium can cause palpitations, especially if you’re on diuretics. Magnesium, another key mineral for heart rhythm control is often overlooked. Almonds, pumpkin seeds, black beans, and dark chocolate (85% cocoa or higher) can help. Studies show people with AFib often have low magnesium levels — and correcting that can cut down on episodes.

On the flip side, sodium, the main component of table salt is a silent troublemaker. Too much raises blood pressure and strains the heart. Processed foods, canned soups, deli meats, and frozen meals are loaded with it. Cutting back doesn’t mean no salt — it means cooking at home, reading labels, and choosing fresh ingredients. Alcohol is another trigger. Even one drink can set off AFib in sensitive people. Binge drinking is especially dangerous, but many don’t realize that a single glass of wine or beer can be enough.

Omega-3s from fatty fish like salmon, mackerel, and sardines help reduce inflammation and lower triglycerides. They’re not a cure, but they support overall heart health. Leafy greens give you fiber, antioxidants, and folate — all good for blood vessels. Whole grains like oats and quinoa keep blood sugar steady, which matters because spikes can stress the heart. Avoid sugary drinks and refined carbs. They don’t just cause weight gain — they worsen insulin resistance, which links directly to AFib progression.

There’s no magic food that fixes AFib overnight. But consistent choices make a difference. People who eat more plants, less processed stuff, and watch their salt and alcohol intake report fewer palpitations and better sleep. You don’t need to be perfect — just consistent. Small swaps add up: swap soda for sparkling water, chips for nuts, white bread for whole grain. These aren’t drastic changes. They’re practical ones that fit real life.

What you’ll find below are real guides from people who’ve been there — from how to build a heart-friendly plate without feeling deprived, to which supplements actually help (and which are a waste), to what foods to avoid if you’re on blood thinners like warfarin. No fluff. Just clear, tested advice you can use today.