I hate everything about this comment.
first of all, low/high levels have a cause. if it's nutrition, yeah, you're right, just measure and correct.
but you come to the conclusion that's nutrition with zero evidence supporting it, and that's annoying as hell, because it's basically shunning the door for people with real conditions that could live 10x times better if only someone would have used a more rigorous method of inquiry instead of 'just nutrition lol'
it doesn't have to be complicated, but it still have to be rigorous.