<< The question is, does taking spirulina interfere with B-12 absorption from
animal sources?  To be more specific, do the B-12 analogues occupy the same
receptors in the body and hence reduce the amount of useful B-12 that can
be absorbed?  (sort of the way trans fatty acids take the place of healthy cis
fatty acids and then don't do the same job). >>

that is the speculation.  i haven't found out for sure, yet.

aaron