KUWAIT CITY, Nov 12:  Personalized vitamin D supplementation, guided by regular blood monitoring, has been shown to reduce the risk of recurrent heart attacks by 52 percent in a recent clinical trial, highlighting the critical role of the nutrient in cardiovascular health.

The landmark study, conducted by Intermountain Medical Center in Utah, followed 630 adults diagnosed with acute heart disease over six years, with an average follow-up period of just over four years. Nearly half of the participants had a prior heart attack, and more than 85 percent had vitamin D levels below 40 nanograms per milliliter (ng/mL), underscoring widespread deficiency among cardiac patients.

Participants were divided into two groups. One group received standard care without adjustment of vitamin D levels, while the second group underwent personalized supplementation guided by serial blood tests to maintain optimal levels above 40 ng/mL. The results demonstrated a 52 percent reduction in recurrent heart attacks in the personalized supplementation group compared with standard care, a significant finding in cardiovascular research.

Vitamin D, primarily produced in the skin through sunlight exposure, is essential for numerous bodily functions. Beyond supporting bone health, it helps regulate blood pressure, reduce inflammation, and support heart muscle function. Low levels of the hormone have been linked to increased heart disease risk and poorer outcomes following cardiac events.

Researchers note that conventional “one-size-fits-all” vitamin D dosing often fails to account for individual variations in metabolism or baseline levels. Personalized supplementation ensures patients reach optimal circulating levels, maximizing cardiovascular protection while avoiding risks of under- or over-supplementation, including hypercalcaemia.

Experts emphasize that vitamin D supplementation is not a replacement for standard heart care, such as lifestyle modification, cholesterol management, and prescribed medications, but a complementary approach. Optimizing vitamin D levels may significantly reduce the likelihood of repeat heart attacks and improve long-term patient outcomes.

The study recommends rigorous monitoring, with blood tests every three months and dose adjustments as needed to maintain target levels. Simple lifestyle measures can also support heart health, including regular sunlight exposure, a balanced diet rich in fruits, vegetables, and whole grains, physical activity, and avoidance of smoking.

Researchers further highlight the importance of nutrient balance, suggesting that adequate intake of calcium and magnesium can enhance vitamin D’s cardiovascular benefits. Proactive monitoring and personalized supplementation could offer a cost-effective strategy to improve heart health and reduce disease burden globally.