[lucideer]

I wouldn't quite say "most" as potatoes are surprisingly nutritious, but yes, it is notable that the article doesn't contain the words "nutrient(s)", "nutritious", "vitamin(s)" or anything similar I could think of.

I've always been curious whether many of these diets lacking appropriate B vitamin requirements might have a compounding effect w.r.t. people's interest & willingness to continue trying such diets...