Heart Attack Risk Halved in Survivors Taking Tailored Vitamin D Doses, Researchers Say

The paper released this month adds to a growing body of research around vitamin D supplementation and heart disease.

A man sits in a hospital waiting room in Irvine, Calif., on July 8, 2025. John Fredricks/The Epoch Times

Researchers found that adult heart attack survivors who took specific vitamin D doses reduced their risk of developing another heart attack by more than half, compared with people who did not take the vitamin D dose.

Research conducted by Utah-based Intermountain Health found that there was a 52 percent lower risk of suffering another heart attack in people who had already survived one and who had received “personalized dosing of vitamin D supplements” to reach vitamin D levels of 40 nanograms per milliliter (ng/ml) for about four years, a statement from the American Heart Association (AHA) reads.