Coverage in The Economist for me moves scientific speculation from the fad to the plausible category. So an Economist article on foods thought to be good for the brain (and fending off Alzheimers) gets read right through, unlike suspect similar stuff in less authoritative magazines.

Fortunately for NZ the article commends kiwifruit (for Omega 3?) and Marmite (for folic acid).

The sting is at the end. The good can all be undone by eating too much. "This puts oxidative stress on the brain and risks undoing all the good work those antioxidants have been up to".