“My mother was taking several meds. One related to her diabetes was to help regulate chromium. I told her to eat grapefruit instead, as she liked it and it was good for chromium. Her response was that the doctor told her not eat grapefruit while taking that med, as it would cause interference. “
You were wrong. Your mother was right.
Grapefruit is not good for chromium.
My bad. I do recall the basis of that story being true regarding grapefruit and some med she was taking, but perhaps it wasn’t chromium. Memories sometimes conflate themselves these days.