Os dejo un artículo interesante sobre la Metilcobalamina (B12).
(Está en inglés)
http://www.health101.org/art_methylcobalamin.htm
http://veg-tv.info/Earthlings
"We need another and a wiser and perhaps a more mystical concept of animals. They are not brethren, they are not underlings: they are other nations, caught with ourselves in the net of life and time, fellow prisoners of the splendour and travail of the earth." Henry Beston