It’s common to resolve to lose weight, but any sane person dreads a diet’s dulling effect on the brain.

In fact, many studies have shown that counting calories, carbs or fat grams, is truly distracting ” to the point that it taxes short-term memory. But how we eat can affect our minds at more fundamental levels, too.

The full story is here:
http://www.livescience.com/health/090107-brain-food.html