I don't know that the problem is the studies so much as it is the media reporting on the studies. We don't really have much of a context or enough information to make any sort of decision if the study should be taken seriously or not. One study proves nothing. You can't really take anything seriously until you see many studies done showing similar results.

But I think one thing is certain, its best to get your vitamins and minerals from your diet rather than rely on supplements.