That article actually turns out to be more balanced than usual. Even the title supports the idea that "prevention" is wishful thinking at this stage, by using the word "grasping."
And it does stress repeatedly that all these notions are theoretical and unproven, but that general good health practices may at least have a positive effect on a person's overall health status.
this one's for you, Joan: http://www.alternet.org/health/151787/red_wine,_dark_chocolate,_blueberries%3A_is_there_any_science_behind_the_%22superfood%22_hype