Heart rhythm is not regulated by a single food; it is shaped by nervous system balance, electrolytes, sleep, stress, and underlying health conditions. Potassium, magnesium, and sodium balance can influence rhythm stability, but randomly supplementing minerals is not a safe strategy. Caffeine, nicotine, energy drinks, and sleep deprivation can increase rhythm sensitivity in susceptible people. Regular exercise and weight control can improve autonomic balance and support a steadier rhythm over time. If palpitations become frequent, clinical evaluation with tests like ECG or Holter monitoring is appropriate. Thyroid disorders, anemia, and dehydration can also contribute to rhythm issues. From a lifestyle perspective, consistent meals, adequate hydration, and limiting excessive alcohol can help. Rhythm disturbances are not merely a comfort problem; they are a clinical signal that should be measured and managed thoughtfully.