Do not labor for the food which perishes, but for the food which endures to eternal life, which the Son of Man will give to you. There is perishable food and eternal food. Perishable food is what refrigerators, freezers, preservatives, and expiration dates are all about. Even the manna in the wilderness had an expiration date - exactly one day, except on the Sabbath day when it lasted two. And if the people tried to store it an extra day, it turned foul and full of worms.
Perishable food feeds perishable life.
That puts both food and the belly in perspective. The foods we eat do not last forever, and neither do the bodies that eat them. We may worry about the negative effects of popcorn popped in tropical oils, tacos, burritos, enchiladas, and whatever else finds it way on the dietary hit list, but in the end we still die. The vitalities and energies of perishable food remain perishable. Our American obsession with calories, cholesterol and carbohydrates, fat, fitness, and fiber may help us live a bit healthier and wiser, though not necessarily happier and certainly not without guilt, but in the end all this anxiety contributes nothing to eternal life.