any food that is considered to aid intelligence, memory, or creativity; by extension, any intellectual sustenance
Every other day, it seems a new “brain food” is making headlines, the latest being turmeric.
As the feller said about fish for a brain food, "It won't do you no good unless there is a germ there to start with."
They contain phosphorus, which is brain food, and sulphur, which performs a variety of functions in the economy.
I guess you call anything a brain food that you happen to like, don't you, Kinney?
But fish is a brain food, and these folks are really the most unintelligent-looking that I ever saw.
The belief that fish is especially rich in phosphorus and valuable as a brain food has no foundation in observed fact.