3- Oily fish:

10 Foods that Strengthen Memory
Omega-3 fatty acids are quite abundant in fish such as salmon, tuna, sardines, and other varieties. These fatty acids assist in enhancing the composition of brain cells (neurons).
4- Nuts:

10 Foods that Strengthen Memory
Omega-3 fatty acids and vitamin E found in abundance in the seeds shield brain cells from oxidative stress, which is a sign of an unbalanced system of oxidizing agents.
and prevents mental decline.
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