Be an adult about it.
You can respectfully let your doctor know you’ve been trying to learn things on your own. (Do not say “I learned it on Google…). Provide your doctor with the information from a respectable resource.
It’s not about getting the doctor to do it your way, but about everyone gaining knowledge, being respectful, and doing what’s best for YOU.
If the disagreement is strong on the doctor’s part and they show (or say) they don’t want you empowered and participating in the decision-making about your treatment and health, you may need to re-evaluate.
If you find yourself having to choose a new doctor, you can take an opportunity to interview the doctor. Ask the hard questions.
Insurances and doctors try to imply that you don’t have a choice about the doctors you see, but don’t be fooled. You still have the power to choose.
The goal is to build the best healthcare team for YOU!