Magnesium plays a vital role in regulating heart rhythm, controlling blood pressure, and preventing arrhythmias by modulating ion channels and electrical activity. “As a cardiologist, I often discuss magnesium’s role in heart health, but all of my patients love their magnesium supplements because they help with sleep. Various forms of magnesium supplements are available, each with unique properties,” Dr. Yaranov said, in a video shared on Instagram.