If you're borderline -
deficient in a vitamin or mineral, your body will respond to it when you eat foods containing it, and then demand you eat more — hence eternal hunger, whether it's hunger for long - lost bacon or for 40 more pounds of broccoli in a desperate bid for
iron and magnesium (both low in broccoli, which
actually has a lot of Vitamin C, but is a low - quality source of Vitamin A and a weak source of calcium as well).