A study out of the university of michigan showing in a 18 week clinical study of rats given a high salt diet to induce high blood pressure as the group given the grapes (grape powder) had not only lower blood presure than the group given the high blood pressure medication Hydrazine but also had stronger hearts as the grapes turned on the glutathione genes in the heart muscle.
Glutathione is the human body's master antioxidant and anti aging compound made from within our cells.
Benefit Of Grapes May Be More Than Skin Deep: Lower Blood Pressure, Reduced Heart Damage - Science Daily