1) (left to right) snyferok / Thinkstock, fotokris / Thinkstock

2) Tijana87 / Thinkstock

3) olgna / Thinkstock

4) ktasimarr / Thinkstock

5) SherSor / Thinkstock

6) Thomas Northcut / Thinkstock

7) Photology1971 / Thinkstock

8) (left to right) fotosr / Thinkstock, monkeybusinessimages / Thinkstock

SOURCES:

The Journal of the Alzheimer's Association: "MIND diet slows cognitive decline with aging."

NIH: "Brain foods: the effects of nutrients on brain function," "Berry fruit enhances beneficial signaling in the brain," "New brain diet slows mental decline," "Cognition: the new frontier for nuts and berries," "Grape juice, berries, and walnuts affect brain aging and behavior," "Dietary intake of berries and flavonoids in relation to cognitive decline," "Alcohol's Damaging Effects on the Brain."

Rush University Medical Center: "Diet May Help Prevent Alzheimer's," "MIND Diet Repeatedly Ranked Among Best."