The only nutrient deficiency that is rather difficult to circumvent with a vegan diet is Vitamin B. Meat is one of the only places humans can obtain it.
Everything else is trivial to obtain via plants.
Everything else is trivial to obtain via plants.
Pasture-raised meat ideally gets its cobalt from the ground, but most of the time there is a lack of cobalt so the animals need supplementation themselves. Factory-farmed animals, however, are always directly supplemented. Ironic, isn't it?
Personally, I have no choice but to supplement my B12s, as meat causes my body to produce kidney stones.