Red wine v/s grape juice

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A news item on yahoo caught my attention. Research shows grape juice has the same protective effect against heart disease that red wine has. Of course, there are caveats - the research was conducted on pig blood vessels, the research was partly funded by a grape juice manufacturer, the type of grape used to make the juice and the process used to make the grape juice influence how much of the polyphenols remain in the juice etc. etc. etc. Makes me wonder, by sensationalising news, do news wires sometimes miss the point totally?