I wrote An Ethic of Eating and Drinking this a while back.

Jesus said not to take much thought about what you eat or drink, and in the United States obedience to this text is running high. What Jesus had in mind was that there are many concerns more important than eating or drinking: the realm of redemption, for one thing. That realm — the “Kingdom of God” — is a place of growth in grace, realized love and care of the poor and weak. In other words, it is a place where transcendent values are played out and where life conquers death. Surely, then, he would not have us ignore the ways in which our eating and drinking deter the spread of this realm in our personal and corporate lives. MORE

ethics