Was kind of wondering the same. Maybe it is what OP is eating? I find certain vitamins make me a little nauseous and it is not just iron. For example I usually cannot take selenium (I usually eat Brazil nuts and have no problem with them but pills, no).
Was wondering about thoughts about the Hexclad? I have the knockoff ones made by Henkels that I got at Costco for $75 or $80 or so for a three pack. Had them for a few months and they have not scratched
As for hamburgers, I grill them in a cast iron pan, bbq, or I make them in the oven broiled, I use the broiler pan that came with the oven. I have no idea what it is made out of but it is black with white specks. My least favorite way to cook hamburgers but it is winter here