Foods that contribute to the improvement of memory include whole grains, nuts, deep-water fish, avocados and blueberries, WebMD reports. Foods that are low in mono- and polyunsaturated fats and low in trans fat and saturated fat may also help in preserving memory, Harvard Medical School suggests.
Other foods that may help improve brain health include seeds, beans, pomegranate juice, fresh-brewed tea and dark chocolate, WebMD states. Foods that are rich in antioxidants help protect the brain from harmful free radicals, and foods rich in omega-3 essential fatty acids improve overall brain function. Foods, such as beans, that help stabilize glucose levels are good for the brain because glucose fuels the brain.
Studies indicate that those who follow the Mediterranean diet have lower rates of dementia related to Alzheimer's disease and lower rates of mild cognitive impairment, a stage of memory loss many people experience before developing Alzheimer's disease, Harvard Medical School advises. This diet is heart-healthy, and a healthy heart is a factor in brain health.
Food included in the Mediterranean diet that aids in brain health includes olive oil, fish, vegetables, whole grains and fruits, Harvard Medical School explains. Other recommendations from the Mediterranean diet include limiting red meat, drinking alcohol in moderation and consuming a maximum of four eggs per week.