Does short-term ingestion of purple grape juice improve endothelial function and reduce LDL oxidation in patients with coronary artery disease?
Short-term ingestion of purple grape juice improves endothelial function and reduces LDL oxidation in patients with coronary artery disease, suggesting a potential mechanism for cardiovascular benefit from flavonoids.
Short-term ingestion of purple grape juice improves FMD and reduces LDL susceptibility to oxidation in CAD patients. Improved endothelium-dependent vasodilation and prevention of LDL oxidation are potential mechanisms by which flavonoids in purple grape products may prevent cardiovascular events, independent of alcohol content.
Stein et al. (1999) studied this question.