Does raised serum and active b12 levels after taking b12 suppliments prove you are able to absorb b12 taken sublingualy?
I keep reading that taking b12 skews results but can't really find the relevance in such a remark or any research on it apart from statements by people.
By what process does it skew results as surely it proves the b12 made it to the blood.
I got my b12 up nicely on suppliments but still feel rotten even dare I say it worse than before I started b12. Much worse.