What kind do you take and which type ? (methyl or cyano?
Tests were done on volunteers and it was found that 1000mcg (1mg) taken orally on an empty stomach yielded 13mcg actually absorbed according to blood tests. So one needs to at least take 1000mcg daily.
Methyl form is the best, as it is activated and ready to go to work.
Cyano has to be changed, and some people lack the genes to do so and therefore it doesn't work as well.
Here is my B12 thread:
http://neurotalk.psychcentral.com/thread85103.html
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Weezie looking at petunias 8.25.2017
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