Exploring the question, Do magnesium & calcium play a role in blood pressure? Your arteries have a thick layer of smooth muscle in their walls. Which helps regulate blood flow & pump blood from your heart, around your body. And this is where magnesium and calcium come into play. As like every other muscle in your body, calcium helps muscles contract. And magnesium helps muscles relax. So calcium & magnesium play essential roles in helping regulate your blood flow. And supporting your overall car