The specific article has not been created for (or "Food" is not part of) Imperialism

Food has two slightly different meanings in Imperialism.

The manufactured, tradeable product, which can be called "canned food", is adequate to feed a single citizen indefinitely, but its ingredients would feed two citizens when raw. It is the only manufactured product that can be obtained from a minor nation.

Raw foods are:

Citizens need a balanced diet. For every four citizens, you need to transport 2 grain, 1 fruit, and 1 meat (the same ingredients that you combine to create two cans of processed food). Additional citizens above a multiple of 4 require grain, fruit, and another grain, successively.

Imperialism 2

Food is not present in (or the article has not been created for) Imperialism 2