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is oral vitamin b12 as effective as intramuscular injection versus administration of for the treatment of patients with vitamin B12 deficiency: a pragmatic, randomised, multicentre, non-inferiority clinical trial undertaken in the primary healthcare setting (Project OB12) Best Vitamin B12 Injection Site:
Description
Functions of B12 in the Body Vitamin B12 is vital for several body functions: Energy Production: B12 helps make ATP, the energy source for cells

Although the data set is rich in numbers and diversity, it does not have the numbers of individuals in racial subgroups that may have revealed potential differential effects

Fortunately, Vitamin C is easy to get through the foods you eat

374, no

Or is the story a bit more complex

Whenever possible avoid getting B12 shots from your PCP unless they also have some background in integrative medicine