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The duration of vitamin B12 in the body depends on several factors, including how well it is absorbed and stored and individual health conditions
Not intended for direct intravenous injection without proper medication reconstitution or dilution
Scherbakov, N
An NAD(+)-Dependent Sirtuin Depropionylase and Deacetylase (Sir2La) from the Probiotic [PMID: 29863862] Laboratory literature summary: An NAD(+)-Dependent Sirtuin Depropionylase and Deacetylase (Sir2La) from the Probiotic Bacterium Lactobacillus acidophilus NCFM
[1] Because intrinsic-factor-dependent uptake in the distal ileum can be absent in conditions such as autoimmune gastritis, pancreatic insufficiency, or bariatric surgery, the intramuscular or subcutaneous route bypasses gastrointestinal barriers and reliably restores serum concentrations
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