A second example of false religious teaching was religious vegetarianism. Paul is not talking about the health merits of any particular diet, and that is not our concern here. The teaching he condemned was vegetarianism as a religious necessity. The eating of meat was thus regulated but not forbidden. God's provision for our needs is to be received with thanksgiving.
Meat is part of that provision.
We may choose to avoid meat, or brussel sprouts, or persimmons, but we may not impose such a preference on others or pretend we are more spiritual in doing so. Thanksgiving is an all-pervasive attitude that God has provided for us. A proper concept of thanksgiving would keep us from injecting our ideas into God' s providence. Just as we are to be thankful for all God's creation, we are to recognize all creatures as good. This is not to say they are all good for food.