6 Things to Eat Today for a Smarter Brain Tomorrow

Total Whole Grain

It's high in B, C, D, and E—a medley that may prevent brain shrinkage linked to Alzheimer's. In a 2012 study, subjects with high levels of those vitamins had significantly larger brains and scored better on visual-spatial tests. "The right nutrient combination may be a recipe for Alzheimer's prevention," says lead author Gene Bowman.

An alternative: Kellogg's Smart Start Antioxidants cereal.