6 b12 injections over 2 weeks Book in for your Vitamin privately. Booster dose is injections for £150, then one injection every 8-12 weeks for £30 depending on your symptoms returning!!! Very B12 Injections: Who Should Get
Description
Conversely, cyanocobalamin functions as a pro-vitamin requiring a two-stage activation: removal of the cyanide group and conversion to active forms based on metabolic needs

Before each injection, take a moment to check the expiration date

The cyanocobalamin form is an FDA-approved commercial product

doi: 10.1039/D1RA06266B