(MENAFN) A specialized vitamin D regimen for patients who have experienced a heart attack notably lowers their likelihood of suffering another, according to research shared at the American Heart Association’s Scientific Sessions 2025 on Sunday.

The investigation targeted adults with heart conditions who had previously undergone a heart attack, aiming to evaluate whether reaching optimal vitamin D levels in the blood could help prevent future cardiovascular events, including heart attacks, strokes, heart failure, hospital admissions, or death.

Participants were randomly divided into two groups: one receiving conventional care and the other receiving customized vitamin D supplementation.

Individuals in the treatment group had their vitamin D doses adjusted every three months until their blood levels surpassed 40 nanograms per milliliter — a threshold considered by many specialists to be essential for optimal health.

The researchers found that participants who followed the personalized vitamin D regimen for nearly four years experienced a 52% lower risk of heart attack compared with those receiving standard care.

“We encourage people with heart disease to discuss vitamin D blood testing and targeted dosing with their health care professionals to meet their individual needs,” stated the study’s lead investigator, Dr. Heidi May.

Although the investigators determined that tailored vitamin D dosing did not significantly decrease the primary combined outcome of death, hospitalization for heart failure, or stroke, the study suggested that vitamin D supplementation may be effective in preventing repeat heart attacks.

MENAFN11112025000045017167ID1110325206