They may also have subclinical conditions that could be affected by metabolic changes
(PubMed) Clements M, Heffernan M, Ward M, et al
Seek emergency help for trouble breathing, facial or throat swelling, severe rash, chest tightness, or fainting after an injection
after an intramuscular injection of 1,000 g of cyanoB 12 , about 150 g is ultimately retained in the body 15 Most vitamin B 12 -deficient individuals in the UK and other countries are treated with intramuscular vitamin B 12 , and vitamin B 12 replacement has been traditionally administered intramuscularly
USA 102 (31), 1107011075
Following your initial treatment period, you might need to receive the shots once a month for three months, and then reduce it to once every three months