Brain food: These 10 foods can up your IQ

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Sardines

Canned sardines are one of the best sources of omega-3 fatty acids out there, and your brain depends on these polyunsaturated fats to slow down the aging process, prevent memory loss, boost your mood and keep your brain alert. Their low mercury content makes them an acceptable alternative to tuna, and you can add them to salads, easy pasta dishes or incorporate them into savory spreads for crackers and bread.