Vitamin D3 Supplementation Linked to Reduced Risk of Repeat Heart Attack
A new study indicates that personalized vitamin D3 supplementation may significantly lower the risk of a second heart attack in individuals with a history of cardiovascular events.
Researchers at Intermountain Health in Salt Lake City conducted a trial monitoring vitamin D blood levels in participants within a month of experiencing a heart attack, adjusting dosages to maintain optimal levels throughout the study. The results showed a nearly 50% reduction in follow-up heart attacks among those receiving targeted vitamin D3 treatment compared to the control group, with a 3.8% rate in the treatment group versus 7.9% in the control group. This finding is particularly important given the rising global prevalence of heart disease.
The study, known as TARGET-D, involved 630 participants, with an average age of 63, and found that 87% had low vitamin D levels at enrollment. Researchers initiated treatment with a high dose of 5,000 IU for nearly 60% of participants, continually adjusting supplementation to reach a target level of 40 nanograms/milliliter. While overall cardiac events weren’t significantly different between groups, the reduction in repeat heart attacks was notable. “It may lower blood pressure and reduce inflammation, both of which have a role in heart disease,” explained Dr. Louis Malinow, Director of Education and Clinical Excellence at MDVIP. More information about maintaining heart health can be found at the Centers for Disease Control and Prevention.
Experts caution that the relationship between vitamin D3 and heart health may be correlational rather than causal, but acknowledge the potential benefits of addressing deficiencies. “I commend the authors for finally being the first to aim at a specific level of vitamin D in this trial,” said Dr. Malinow. Researchers plan to launch a larger clinical trial to validate these findings and explore the potential for broader preventative applications of targeted vitamin D3 therapy, building on previous research into vitamin D deficiency.
The research team intends to continue investigating the optimal vitamin D levels and long-term effects of supplementation on cardiovascular health.
