In one study, 75 men and women taking prescription statin drugs for cardiovascular disease (CVD) took either 8 mg of resveratrol per day, or a conventional grape supplement without resveratrol, or a placebo for six months. Participants then doubled the dose of resveratrol for the next six months. Qualifying participants had either diabetes or high cholesterol along with one or more other factors that raised chances for CVD.
After 12 months, while there were no changes in the other two groups, those who took resveratrol had a 26 percent decrease in levels of inflammatory C-reactive protein, lower levels of other inflammatory signs, an increase in anti-inflammatory factors, and a rebalancing of blood-clotting factors.
Doctors said this is the first study to show resveratrol may help prevent CVD.