A study that appeared in the Journal of Nutrition shows that eating fresh grapes may prevent the accumulation of harmful oxidized cholesterol as well as the development of atherosclerotic lesions. Naturally occurring antioxidants in fresh grapes known as polyphenols are believed to be responsible for this beneficial impact.
Grapes may also be potent against viruses and tumors because of their high concentration of another polyphenol, tannin. A team of Canadian scientists discovered that grapes eliminated disease-forming viruses in test tubes. Tannin, a virus fighter, seems to be the reason. These tannins are absorbed directly into the intestinal tract where they do the most good.
Grapes also contain high levels of caffeic acid. This acid is a strong cancer fighting substance. Johanna Brandt tells us about her experience with grapes in her book The Grape Cure. She describes how she healed herself with a four-stage program, eating nothing but grapes. She even chewed the seeds.
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