Oysters: Oysters aren't just for frivolous cocktail parties.
Tea and coffee: Caffeine is far and away the world's favorite drug.
Kale: Kale has made quite a name for itself as a superfood, and for good reason.
Carrots: Carrots are the classic veggie friend of the eyes, and for good reason.
Walnuts: Studies have shown that walnuts can help improve memory.
Fatty fish: Fatty fish like salmon, mackerel, and cod are some of the best sources of omega-3 out there.