Food - that essential element of life, had accompanied humanity from the very beginning and would remain until the end or even after the last man breathed his final sigh.
Everyone knew that food was necessary to simply live, but it could also give strength and heal, as well as lead to poisoning or death if the food was poisonous.
In any case, water was as necessary for any living creature as water and oxygen. Humans, however, had long ago stopped considering food as a source of calories, for humanity, food represented another value - pleasure.
Sure, food was only a source of pleasure when it was plentiful, but in the Citadel only the slums could have a problem with food.
Most people in the Third Ring could afford to eat meat a few times a week, while in the Second Ring, even delicacies on a daily basis were not a problem.