Earlier quoted context omitted.
Wow this has gone off the rails quickly. To wit: Arsenic is not an essential micronutrient. "Trace quantities of arsenic have been proposed to be an essential dietary element in rats, hamsters, goats, and chickens. Research has not been conducted to determine whether small amounts of arsenic may play a role in human metabolism." [1] [1] https://en.wikipedia.org/wiki/Arsenic
There is substantial evidence that arsenic is a required micronutrient in all mammalian biology. This is not even controversial, you can reliably induce deficiency syndromes in a broad spectrum of animal models, and the operative pathways exist in humans. The effect was first observed in animal husbandry in parts of the world with very low background arsenic levels. It has the same toxicity and micronutrient profile…
The authority that I have appealed to (Wikipedia) is a reasonable one and bias should not be implied in the absence of these supposed corrections you have to make.
I’m open-minded …