The antiinflammatory agents in grapes greatly help reduce the risks of inflammatory problems like rheumatism, gout and asthma. Grape seeds are the source of the popular supplement, grapeseed extract. Besides being a powerful antioxidant, grapeseed extract is also antiallergenic, an antihistamine, and antiinflammatory. It strengthens blood vessels, aids in circulation, improves skin elasticity, and promotes healthy hair growth. Grapeseed extract contains bioflavonoids which help protect cell membranes and guard against oxidative damage caused by free radicals.