Salmon

This swimmer isn’t just good for your ticker, it’s good for your grey matter too. Salmon is a top source of DHA, the predominant omega-3 fat in your brain, believed to protect against Alzheimer’s disease, an illness that affects over five million Americans. It’s also nature’s number one source of hard-to-get vitamin D, a nutrient recently shown to ward off cognitive decline. A study published in the July 2010 issue of the Archives of Internal Medicine reveals that older people who are vitamin D deficient are 40% more likely to suffer from age-related memory loss.

See More: Top-Rated Salmon Recipes