My mother was a head nurse / nurse practitioner before she retired and to this day she is a fountain of unwanted, long disproved (or at least questioned) nutrit

My mother was a head nurse / nurse practitioner before she retired and to this day she is a fountain of unwanted, long disproved (or at least questioned) nutritional "facts" which she repeats endlessly. The one that has grated on me for decades is old propaganda from WWII about carrots promoting eye health and bestowing night vision... though fats are easily in her top five evil substances list. There is literally nothing I've been able to do to change behavior, including keeping an entire directory full of publications of studies refuting whatever falsehood she's spouting to read out loud at the dinner table when I come to visit.