Some good news....the latest is that dark chocolate is not only good for arteries but can lower blood pressure as much as most meds do. The catch is, it must be at least 65% cocoa, which isn't as sweet as the majority of sugar-filled chocolate bars out there which contain very little cocoa. I've actually tried the 85%, it's not great but not incredibly bad...65% is definately still yummy.
Of course, it should be in moderation(lets not go nuts here, it has calories)
But of course, if one does not incorporate healthy lifestyle also with any herb, oil,food, etc. then it might be a waste of time and money.