[Extra! Extra!] Vitamin D3 Treatment May Prevent Second Heart Attack

A new study from Intermountain Health in Salt Lake City reports that a personalized vitamin D3 treatment plan for patients who have suffered a heart attack can greatly reduce their chances of another one.

According to ScienceDaily.com, in a large randomized clinical trial, researchers found that managing patients’ vitamin D levels through a “target-to-treat” approach—where blood levels were monitored and dosages were adjusted to reach an optimal range—cut the likelihood of a second heart attack by 50 percent.

The findings were presented on Nov. 9 at the 2025 American Heart Association Scientific Sessions in New Orleans.

Encouraging Early Results from Intermountain Researchers

These results are very encouraging, said Heidi May, PhD, cardiovascular epidemiologist at Intermountain Health and the study’s principal investigator. “We observed no adverse outcomes when giving patients higher doses of vitamin D3 supplementation, and to significantly reduce the risk of another heart attack, which are exciting results,” said May. “We’re excited with these results but know we have further work to do to validate these findings.”

For more information, visit https://www.sciencedaily.com/releases/2025/11/251110021043.htm.

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