"You can’t change someone else’s mind; they have to change their own mind. The sophisticated approach is to ask them questions that lead them to doubt, and gently lead them to discover the truth for themselves. That is something Socrates was very good at; I’m not. But I can suggest some questions to ask."
The Socratic Method, popularized in the atheist community by Peter Boghossian, is applicable to alternatives to medicine proponents as well.
SCIENCE (from the Latin for 'knowledge') informs wisdom, reason and humanism. This is a 4-legged worldview within reality that maximizes well-being for individuals and society.