Black grapes which are known for their velvety color and sweet flavor, come packed with nutrients and antioxidants. With their cultivation dating back to 6,000 to 8,000 years ago, they are said to be the oldest cultivated fruit in the Near East and Europe, and are botanically known as Vitis vinifera.
Black grapes are chock-full of antioxidants like resveratrol, flavonoids, and quercetin that regulate diabetes, promote heart health, and even prevent cancer. These fruits also combat inflammation and other associated ailments.
1. May Help Manage Diabetes
The resveratrol in black grapes may improve insulin sensitivity. This can enhance your body’s ability to use glucose, thereby lowering blood sugar levels.
The compound also increases the number of glucose receptors on cell membranes. This may also help regulate your blood sugar levels.
More importantly, grapes, in general, have a mean glycemic index. Studies show that diets low in GI improve diabetes symptoms. The resveratrol in grapes also improves the functioning of pancreatic beta cells (cells that make insulin, a hormone that controls glucose levels).
Pterostilbene, another compound in grapes, also helps lower blood sugar levels.
Black grapes also prevent the loss of beta cells, which is a common complication in diabetes.
2. May Promote Heart Health
The polyphenols in black grapes fight free radicals, which can cause heart disease. These compounds help treat hypertension and inflammation. They also improve endothelial (of the blood vessels) function.
Black grapes contain flavonoids, phenolic acids, and resveratrol – all of which can reduce cardiovascular mortality.
These compounds also have anti-platelet effects. They prevent the aggregation of platelets (the clumping of platelets, forming a clot), thereby preventing strokes or heart attacks.
The potassium in grapes also promotes heart health.