What foods can keep my brain strong?

While physics would dictate that your food travels down after you eat it, a certain amount travels up to your brain (via arteries after it's been through the digestive process, of course). Among the best nutrients to help keep your cerebral power lines strong are omega-3 fatty acids—the kinds of fat found in fish like salmon and mahi-mahi. These healthy fats, which have been shown to slow cognitive decline in people who are at risk, not only help keep your arteries clear but improve the function of your message-sending neurotransmitters.

Aim for 13 ounces of fish a week, or, if you prefer supplements, take 2 grams of fish oil a day (metabolically distilled), or DHA from algae (where fish get their omega-3s), or an ounce of walnuts a day. DHA is the omega-3 that seems best for the brain.

Also load up on salad. The veggies, not the fat-laden dressing. It's been shown that vegetables—any kind, any place—slow cognitive decline even more than fruits. Eating two or more servings a day (just two!) decreases the decline in thinking by 35 percent over six years. Pass the sprouts, please.

Watch the video to find out what foods Dr. Oz recommends to keep your brain healthy.