What it is
A nut. Gathered by every ancestor you have — fat, protein, and a shell that proves nobody processed it much.
Why your biology objects
Whole-food fat, protein, fiber, and minerals in one package (one Brazil nut covers your selenium). The footnotes: the skins carry phytates (almonds add a real oxalate load), and the fragile fats mean rancidity matters — soaking and roasting were the old workarounds, and the dose decides.