Fredrik Murman wrote:

 > I have a sort of reference book in nutrition, written by a norwegian doctor
 > named Knut T. Flytlie. The book is published in 1997. The doctor claims
 > that vitamin B12 can occur in very small amounts in ecologically grown
 > vegetables. I don't know if this is true. I haven't had time to verify his
 > claim. Further, I would like to know what he means by "small amounts".

In short, it looks like under certain circumstances even a vegan can
make or eat "enough" of vitamin B12.

A little is made by bacteria in the ileum (just before the colon) ,
where it *can* be absorbed. Plants fertilized with animal (or human)
"dung" absorb the B12 from the soil. Dung has lots of b12.
B12 is always made only bacteria - mostly in the gut of animal or human.

Together this sums up to about the lower end of the recommended levels
or slightly below.

If you like in depth reading, look at:
http://veganoutreach.org/health/B122002.pdf

Amadeus S.