I think there's two points here. 1) the myth that spinach is a significantly better source of iron than other iron-rich vegatables, and 2) the myth that it came

I think there's two points here. 1) the myth that spinach is a significantly better source of iron than other iron-rich vegatables, and 2) the myth that it came from misreading a decimal point. I meant #1. Certainly myth #2 still exists in the 21st century. DDG easily finds recent examples, like https://hekint.org/2022/07/18/spinach-the-great-myth/ https://hekint.org/2022/07/18/spinach-the-great-myth/ .