“Polyphenols are a large class of phytonutrients known for their antioxidant properties. Some of the polyphenols found in grapes include phenolic acids, anthocyanins, flavonoids, and stilbenes.”
“Many of the health benefits of grapes are due to the effects of these compounds on the body, especially their anti-inflammatory properties,” explains nutritionist Avery Zenker.
She adds that when ingested, these polyphenols neutralize free radicals and over time can improve cardiovascular, brain, immune, and metabolic health.
“Most of the polyphenols and antioxidants in purple and red grapes are found in the skin. Purple grapes contain more anthocyanins than red grapes and much more than green grapes.”
“Purple grapes also have a higher total antioxidant capacity than red or green grapes. The color of purple grapes indicates high antioxidant content,” Zenker noted.
The expert also notes that you don’t have to eat a mountain of grapes to reap the benefits—just one to two cups (or 22 to 44 grapes, to be exact) can provide huge health benefits.
Grapes improve heart health
“Grapes are rich in resveratrol and proanthocyanidins, compounds that may promote heart health by helping blood vessels relax, lowering blood pressure,” says cardiologist and nutritionist Michelle Rutenstein.
This may be especially beneficial for people at high risk of heart disease; the more grapes you eat, the more heart-healthy nutrients you get.
