> most people don't eat those.

Most Americans don't think they eat organs, but they are a big component of most processed meat foods, like sausages. But offal consumption is prevalent in the rest of the world. Even in the US, you can find offal in many Mexican restaurants.

But you can also find much that is good in Mexican restaur... oh, wait, you said offal, not awful.

B12 is made by bacteria. We used to get more than enough from untreated water and soil on food we ate. Modern meat supplies are also supplemented.

B12 comes from bacteria in the dust, and is injected in factory farmed animals otherwise they would not have it and become sick due to conditions. Might as well getting it from contact with nature or by taking the supplement directly instead of taking second hand via a cow.

Liver is becoming popular again and will probably reach mainstream trendiness in the next few years. It’s full of micronutrients