Supplemental Vitamin C helps - but getting it from food is worthless!

PMID 15585762 - Antioxidant vitamins and coronary heart disease risk: a pooled analysis of 9 cohorts.

This study was published in The American Journal of Clinical Nutrition in 2004 and concludes: "Dietary intake of antioxidant vitamins was only weakly related to a reduced CHD risk" but also "The results suggest a reduced incidence of major CHD events at high supplemental vitamin C intakes."

The risk reductions for vitamin E and carotinoids were small.