A. Introduction Our aim in this paper is to consider two related questions, which go to the heart of the larger concern of conflict between a patient's choice and a medical professional's judgment about the proper course of treatment and care. First, how should a medical professional respond to a patient's refusal to conform to medically necessary dietary advice? Second, having been confronted with such a refusal, how should that medical professional then respond to the patient's request of an alternative but potentially harmful dietary choice? (1) We will examine these questions--of refusal and then of contra-indicated demands--by reviewing and analyzing pertinent Canadian authorities, giving particular consideration to the applicable standard of care that is required of a medical professional in the circumstances just described.