that statement comes from a medical book, it also was explaining that milk was a deadly food. it was making a point that by mass marketing on 1/2 truths the american gulable people will buy anything.
i have no problem with the bananna, but it is a none-food as far as value, unless just picked and well ripe. most authors state the bannana must be 1/2 black before eaten, i personally don't like them that ripe.
if you want potassium, the dewormer is loaded, elderberries are king. i make a potassium formula, but use all these things in what i call "pica" mineral formula as well as the longevity 2006 version. potassium and iron are my two goals to solve, they are at the root of all diseases.