Who do you trust for medical information?

As you may know, on this site there's a discussion about whether AI can be trusted for medical information:
https://connect.mayoclinic.org/blog/about-connect/newsfeed-post/can-you-trust-ai-for-health-advice/
It made me wonder -- what sources *can* you trust?

To be honest, I've gotten some bad information from doctors. It's made me wary of snap judgments, and skeptical in general. (By nature, I'm a contrarian anyway.)

What sources of information/data do you trust?
Advertisements for prescriptions or supplements?
Friends (anecdotes, etc.)?
Professionals?
Internet research (which can run the gamut from "Dr. Google" to published research)?
Personal experience?

If you went to a doctor who handed you a pill and said, "Take this right now," would you? (I wouldn't, not without knowing what it was, how much, side effects, etc.)