Personalized Vitamin D Levels Cut Repeat Heart Attack Risk by Half

• A new Intermountain Health study presented at the American Heart Association's 2025 Scientific Sessions found that adults with heart disease who optimized their vitamin D levels cut their risk of another heart attack by 52%
• Most participants began the trial with low vitamin D levels, showing that deficiency is common in people with cardiovascular disease and silently increases the risk of recurring heart problems
• More than half of the patients needed over 5,000 IU of vitamin D3 daily — six times the FDA's recommended intake — to reach protective blood levels between 40 and 80 ng/mL
• Vitamin D acts as a hormone that helps lower inflammation, maintain proper calcium balance, improve blood vessel function, and reduce oxidative stress — all key to preventing heart damage
• Regular testing, personalized dosing, sunlight exposure, and daily exercise are simple, measurable ways to restore vitamin D, strengthen your heart, and reduce your risk of another cardiac event