Comment by forward1

That has less to do with being vegan and all to do with being aware of what micronutrients your body needs to thrive. Everyone benefits from B12 supplementation as it's no longer possible to derive it from the natural environment; even farm animals are routinely injected with B12 and a cocktail of other vitamins.

Non-vegans have just as many nutritional deficiencies, if not more, like a total lack in fiber. And for every neglectful vegan, there are ten unhealthy animal product-eating individuals with even more debilitating diseases, like diabetes, for example.

Also, DHA/EPA is synthesized in the body; it's not necessary to supplement them, nor any other vitamins you had listed, other than B12 and possibly D3 (depending on your latitude).