On the basis that we do not know why there seems to have been a change, to say " a rather spiteful tactic to generate pressure " seems somewhat of a leap to a conclusion
Many people notice more energy within about 24 to 72 hours
This injection is typically prescribed to potentially prevent or treat deficiencies of these B vitamins and to support patients with conditions like malabsorption, increased metabolic demand, or recovery from illness where oral vitamin intake is insufficient
Long-Term Management of B12 Deficiency Managing vitamin B12 deficiency in the long-term typically involves: Regular B12 supplementation, either through injections or oral therapy Dosage can vary from 1 to 5 mg daily Administered over a period of one to four months or until laboratory results indicate improvement in hematologic and/or neurologic functions Consult with a healthcare professional for personalized advice on managing vitamin B12 deficiency in the long-term and determining the most appropriate supplementation method for you
Though adverse effects havent been widely reported, side effects can vary based on individual health
Neelakantan H, Vance V, Wetzel MD, et al