Jan 7, 2020, 10:37 AM

@Rinel said in What do you eat?:

It's very important to distinguish between veganism and vegetarianism. Vegetarianism has an ancient history. Veganism, in contrast, has only been possible since the 20th century (when it was invented), because a vegan diet will cause fatal B12 deficiency without supplementation that was impossible to provide through vegan means until then.

But B12 doesn't come from animal products; it comes from bacteria, and with livestock being fed antibiotics, B12 has to be supplemented in their diets.

In the wild and throughout most of human history, B12 would've just as easily been gotten by drinking unpurified water. Our hygienic lives today mean it has to be supplemented artificially, either via the animals we eat, or in tablet form directly.

It's the only vitamin which can't be obtained from a plant-based diet in adequate quantities and which vegans can be found measurably deficient in, but that's actually true for omnivores, too. (Source) Like Vitamin D, it's one of those things we should probably all be taking in supplement form, regardless of what you eat.