Study Finds Personalized Vitamin D Lowers Recurrent Heart Attack Risk

(MENAFN) A new study suggests that customized vitamin D therapy can dramatically lower the risk of subsequent heart attacks in patients who have already suffered one, according to research unveiled at the American Heart Association’s Scientific Sessions 2025 on Sunday.

The investigation targeted adults with heart disease who had a prior heart attack, assessing whether maintaining optimal vitamin D levels could prevent future cardiovascular events such as heart attacks, strokes, heart failure, hospitalizations, or death.

Participants were randomly divided into two groups: one receiving standard care and another receiving individualized vitamin D supplementation.

In the treatment arm, doses were adjusted every three months until blood levels surpassed 40 nanograms per milliliter, a threshold widely considered essential for optimal health.

Researchers found that over nearly four years, participants receiving tailored vitamin D therapy experienced a 52% reduction in the risk of another heart attack compared with those under 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,” said the study’s principal investigator, Dr. Heidi May.

Although the study noted that personalized vitamin D did not significantly affect the primary outcome of death, heart failure hospitalization, or stroke, the findings highlight its potential role in preventing recurrent heart attacks.

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