Grazing animals get their B12 from dirt, because they don't wash their greens.
If you purchase B12 fortified vegan foods, you don't have to eat supplements.
When you wash your salads and don't eat fortified foods, then you should eat B12 supplements ... there are vegan B12 supplements from algae on the market.
Farm animals eat tons of added B12 in their feed.
Grazing animals get their B12 from dirt, because they don't wash their greens.
If you purchase B12 fortified vegan foods, you don't have to eat supplements.
When you wash your salads and don't eat fortified foods, then you should eat B12 supplements ... there are vegan B12 supplements from algae on the market.