Polyphenols of Grapes

"All grape varieties contain polyphenols.

Polyphenols are compounds that give grapes and certain other plants their vibrant colors.
Polyphenols are known antioxidants that help fight free radicals in the body. 

The grape skins and pulp contain the most polyphenols. 

They also have the highest antioxidant abilities.

Grapes are good for you, in large part thanks to their polyphenol content. 

Polyphenols may help fight:

diabetes

cancer

Alzheimer’s disease

lung disease

osteoporosis

heart disease

Eat grapes for a healthier heart.

The polyphenols in grapes may help prevent cardiovascular disease.
In addition to scavenging free radicals, it’s thought that grapes have anti-inflammatory effects, antiplatelet effects, and support endothelial function. Endothelial dysfunction is linked with risk factors for the buildup of plaque in the arteries, or atherosclerosis."
Healthline