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The use of non-sterile injection techniques in unregulated settings increases infection risk, including abscess formation or blood-borne virus transmission
Vitamin B12 influences protein, carbohydrate and fat metabolism and promotes formation of red blood cells
The active species is the cation CHN at 159.21 g/mol, and it is supplied as the iodide salt, CHIN, molecular weight 286.11 g/mol, CAS 42464-96-0
For subcutaneous injections, the abdominal site is preferred for most peptides due to the consistent subcutaneous fat layer thickness, proximity to the gut-associated lymphoid tissue (relevant for some anti-inflammatory peptides), and the practical convenience of self-administration in research settings
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