As far as I can tell I've never been able to convince anyone of anything related to food. It's as if they see me as some kind of special case and that my experience has nothing to do with them. Or they see themselves as special cases and no matter what I say their special circumstances make my advice meaningless. I've pretty much given up trying to change anyone's mind on the individual level, unless they ask and even when that happens they usually revert back to their old ways. On the larger societal level, government food policies have the ability to cause so much harm so I am willing to ad my voice in any small way I can but it feels like spitting in the wind.