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Although cyanocobalamin is more readily absorbed, much of it is excreted through the urine before it can reach the cells Cyanocobalamin vs Hydroxocobalamin In comparison to hydroxocobalamin, cyanocobalamin has a significantly worse absorption rate and storability, which is why today mostly hydroxocobalamin is used in B12 injections
Pharmacokinetic data (half-life etc.) is not shown as it requires owner-confirmed verified references
the first lab may measure and report a value of 220 pmol/l, and a different lab may measure and report 380 pmol/l, again in the same blood sample (!) There is day-to-day variation of serum B12
By adding 3mL, the solution is more diluted, allowing for higher precision when using larger syringe sizes
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The most common are mild and temporary
