Eating grapes has been proven to reduce the risk of heart disease and diabetes. Now, it seems that grapes are useful for lowering blood pressure as well. Researchers at the University of Michigan fed rats a combination of dried table grape powder, hydrazine (a hypertension medication), and salty foods. The dried grape powder made up 3 percent of the rat's diet.
After 18 weeks it was found that, in general, rats on a dried grape powder-enriched diet had lower blood pressure, better heart function, and less inflammation than rats on the other diets. Even though rats on the high salt/grape powder and high salt/hydrazine diet still developed high blood pressure, their systolic pressure was lower in the grape powder group than on the control group on only a high salt diet.
Researchers believe it's the flavonoids and anti-oxidants in grapes that have the beneficial effect on high blood pressure and heart health.
For more information on this research, go to: WebMD.