[rscho]

1. People want to take metformin. They will cite various sources they extract from Pubmed, but the truth is that they got the impression that metformin was good for them while reading pop-sci articles and Facebook threads.

2. They then proceed to ask their doc for metformin, since it's a prescription drug. Unless the doc wants to commit career-seppuku or the patient has a reason for taking metformin according to current guidelines based on years of clinical use and research, the doc will refuse even when presented said Pubmed evidence.

Conclusion: people who want to take metformin will look into alternate sources, because they built a preconceived belief and nothing a sensible professional says will change their mind. People then proceed with metformin and if a change in indication occurs in the future that agrees with their belief, they will feel vindicated while in fact they are just lucky fools.