Not a cooking enthusiast but you should not put cast iron in the dishwasher. Heat some water in the pan, add a tiny drop of soap and use a spatula to scrape off any residue. Once dry add some oil (otherwise it will rust)
I have never been able to figure out stainless steel on the other hand. Apparently the trick is getting to the right temperature but I have never gotten it to work.
On the health side, Teflon pans used to be considered totally safe until they were not. Now they are considered safe again as they no longer use PFOA. Burnt oil and iron oxide might not be ideal either but at least it isn't novel to humans as it has been used for thousands of years. Unfortunately, difficult to get hard science on such subjects as it would have extremely large studies conducted over large periods of time to overcome the noise. In any case there are probably far more impactful decisions in life than which kind of pan to use.
I have never been able to figure out stainless steel on the other hand. Apparently the trick is getting to the right temperature but I have never gotten it to work.
On the health side, Teflon pans used to be considered totally safe until they were not. Now they are considered safe again as they no longer use PFOA. Burnt oil and iron oxide might not be ideal either but at least it isn't novel to humans as it has been used for thousands of years. Unfortunately, difficult to get hard science on such subjects as it would have extremely large studies conducted over large periods of time to overcome the noise. In any case there are probably far more impactful decisions in life than which kind of pan to use.