HealthVitamin D Can Mend a Broken HeartNew research reveals microscopic medicinal effect the sunshine vitamin can have on sick cellsSavePrintSunshine can deliver a dose of vitamin D capable of improving blood flow. Mladen Mitrinovic/ShutterstockWilliam F. Supple, Jr.Ph.D.7/1/2020|Updated: 3/24/2023First, the bad news.Cardiovascular disease (CVD) is the No. 1 cause of death worldwide.We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.