our body kind of tells us waht we need. I have heard accounts of American servicemen pow's in ww2 say what they were deficient in was on their mind constantly, if it was protein they were preoccupied with thoughts of steaks and such.
I recall the story of a lady who went to the north pole, at the coldest, most rigorous part of the trip the thing that tasted best to her as a quarter stick of butter dipped in sugar, pure energy, you wouldn't see that go over well at a 4th of July Picnic here in the U.S.