As long as the physician puts several disclaimers on what they say, then they can counsel patients to go against the consensus, as long as it does not pose significant health risks to them or others around them. The disclaimers are that this is different than the consensus and relating what the consensus is and why. Also, the physician should not defend their position but simply give a website link or other resource that the patient can access on their own time if they so desire. If the patient showed interest, the physician would need to relate any and all possible negative health affects of following the alternative treatment plan.