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We moved away from IV because intracellular NAD+ levels, which is where the benefit actually happens, do not reliably increase with IV administration
"cis-diol dehydrogenases encoded by the TOL pWW0 plasmid xylL gene and the Acinetobacter calcoaceticus chromosomal benD gene are members of the short-chain alcohol dehydrogenase superfamily"
Spoiler: yes, it absolutely does
If you use another B12 injection kit (hopefully not cyano B12), aim for at least 1 mg of B12 per shot, which is plenty
Research has shown that even in people without any underlying health conditions, when taking a 500 microgram oral supplement, only 10 micrograms (or 2%) is absorbed (Carmel, 2008)
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