Final answer:
Magnesium is the heart-healthy nutrient that plays a crucial role in maintaining a healthy heart by regulating heart rhythm, maintaining blood pressure, and supporting the overall cardiovascular system.
Step-by-step explanation:
The nutrient that is heart healthy is magnesium. Magnesium plays a crucial role in maintaining a healthy heart by regulating heart rhythm, maintaining blood pressure, and supporting the overall cardiovascular system. It helps in relaxing blood vessels and preventing artery calcification, which can reduce the risk of heart disease.
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