sublingual b12 vs injections Vitamin vs. Supplements: Which is Right for You? Are B12 Patches as Effective

Allow to separate, draw off the lower layer into a second small separator, add 5 mL of 5 N sulfuric acid, shake well, and allow to separate completely (the complete separation of the layer may be facilitated by centrifuging): the separated upper layer is colorless or has no more color than a mixture of 0.15 mL of 0.10 N potassium permanganate and 250 mL of water

Remove any air bubbles and then inject into the muscle

J Pediatrics 1982;101:771-4

However, there can also be slow or subcutaneous (in a vein or under the skin injected)

Qu es la vitamina B

5) Other Medical Conditions Persistently high vitamin B12 has been observed in some cancers and in certain chronic inflammatory conditions