"Oral High-Dose Multivitamins and Minerals After Myocardial Infarction: A Randomized Trial"
Annals
http://annals.org/article.aspx?articleid=1789248
"Conclusion: High-dose oral multivitamins and multiminerals did not statistically significantly reduce cardiovascular events in patients after MI who received standard medications. However, this conclusion is tempered by the nonadherence rate."