Thank you. And yes I even printed off some peer-reviewed studies about IPF and Metformin for Dad to take with him to the doctor. The doctor would "look into it" but I suspect that Dad who was not great at anything technical would have agreed with the doctor and not challenged him.

My mother has type 2 diabetes so Metformin was right there in the house. It's infuriating to think Metformin could have made Dad's life better. Maybe not cure him but at least help a tiny bit.

The other problem severely ill people who have been sick for years give up before they even know it. I saw it in Dad but I couldn't see the effects of anxiety which was also there until it was too late. Anxiety is what eventually killed him more than his disease.