"All beings subsist on food", was said by the Buddha, contemplation of this truth will lead to awakening, to liberation.
You are empty of independence, empty of self-existence, because You depend on food.
Is the food You see on the market stall You? How does it become You, after you have digested it?
Are the water, earth, manure and sunshine, that the vegetables depend on, also You?
Sutta where nutriments are discussed http://www.accesstoinsight.org/lib/authors/nyanaponika/wheel105.html