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Blood testing for B12 directly hasnt got a gold standard either Total/serum B12 contains both the active/useable fraction (holotranscobalamin) and the inactive fraction bound to a carrier (holohaptocorrin)
18 The most bioavailable forms of B12 are methylcobalamin, hydroxocobalamin, and adenosylcobalamin
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Put the needle straight into the muscle at a 90-degree angle
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit
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