Adam replied on Permalink
Animals DO NOT need to be sacrificed-pollution,deforestation,etc
The requirement for vitamin B12 is very low, but it is essential. Non-animal sources include Red Star Vegetarian Support Formula or T-6635+ nutritional yeast (a little less than 1 Tablespoon supplies the adult RDA) and vitamin B12 fortified soy milk. It is especially important for pregnant and lactating women, infants, and children to have reliable sources of vitamin B12 in their diets.