normal dose of vitamin b12 injection Dosages: Your GoodRx Guide Vitamin B12 Injection Dosage for

Medical professionals recommend that these injections should only be used during pregnancy when clearly necessary, and the risks and benefits must be carefully evaluated by a healthcare provider

B12 shots can be highly effective in alleviating fatigue and low energy by restoring essential vitamin B12 levels that support red blood cell production and energy metabolism

doi:10.3390/nano11030743

Effect of vitamin B12 deficiency on neurodevelopment in infants: current knowledge and possible mechanisms. Nutr Rev

Read it as what has been reported , not as what is known to be safe long-term

An average person can have enough stored B12 to last them 3 to 5 years