It would be nice if the amount of energy that a food gives was included in the description. At the moment it's a case of buy one of something to find out how much energy it gives. And the higher the price doesn't mean it gives more energy either.
The price of food (or value, rather, which can be found in the encyclopedia or under information on the item itself) = amount of energy given. For example, meat tetrazzini has a value of 192 currants. It gives 192 energy. That doesn't mean people are selling it for 192 currants on the auction though.
It would be nice if it were on the info page for a food expressly though, since not everyone will realize that the value on the info page = the energy value.