Heart Attack Risk Cut by 52% in Survivors with Personalized Vitamin D Dosing, Study Finds
Breakthrough research reveals that heart attack survivors who follow customized vitamin D supplementation to reach optimal blood levels can slash their risk of a second heart attack by 52%, according to findings presented at the American Heart Association (AHA) Scientific Sessions 2025.
Over 85% of participants started with vitamin D deficiency (below 40 ng/mL), and nearly 52% required more than 5,000 IU daily — over six times the FDA’s general recommendation of 800 IU — to hit the target.
“We observed no adverse outcomes with higher-dose vitamin D3 and a significant drop in repeat heart attacks — truly exciting results,”
Why Personalized Dosing Matters
Unlike past trials that used fixed doses regardless of individual needs, this study tested and adjusted vitamin D levels throughout, proving that one-size-fits-all supplementation fails for heart health.
During follow-up, only 107 major cardiac events (including heart attacks, strokes, and heart failure hospitalizations) occurred — with the personalized group showing dramatically lower rates.
Natural Sources vs. Targeted Supplementation
- Food sources: Fatty fish, egg yolks, fortified milk, orange juice, cheese
- Sun exposure: Activates vitamin D in skin
- Supplements: Vitamin D3 proven most effective in clinical settings
Researchers now urge post-heart attack patients to get tested and work with doctors on tailored vitamin D plans to prevent recurrence.
Have you had a heart attack? Ask your doctor about vitamin D blood testing and personalized dosing today.
