As you might expect, the supplement known as grape seed extract is extracted from the seeds and skins of red grapes. These are the same kind of red grapes used to make wine, and the same grapes thought to provide the health benefits that allow the French to eat a fatty diet while staying free of the rampant heart disease that afflicts many of Americans.

Grape seed extract has been used extensively throughout Europe, and it is known to be a rich source of flavonoids which are phytochemicals whose antioxidant properties may exceed those of other well known vitamins. Antioxidants are thought to play a role in the prevention of many diseases, due to their ability to reduce the damage done by free radicals in the body. The most valuable of these flavonoids are thought to be the procyanidolic oligomers. These compounds are known to be strong antioxidants, and they are also thought to help improve blood flow and strengthen the blood vessels. This increases blood circulation may help to strengthen and protect the heart.

This effect on blood flow makes supplementation with grape seed extract a good idea for those who are likely to benefit from increased blood flow. This includes those with leg cramps, diabetes, varicose veins and numbness of the legs and arms. The increased blood flow may even help to treat erectile dysfunction. In addition, eye diseases common to the elderly, like cataracts and macular degeneration, may be prevented by grape seed extract. Grape seed extract is also believed to help combat less serious eye problems such as eye strain.

Lastly, grape seed extract may be extremely beneficial for seasonal allergies. According to a study on allergies shown on Web MD, using grape seed extract in supplement form can be extremely helpful in reducing allergy symptoms, particularly in conjunction with vitamin C.