does b12 injection go into muscle Injecting B12 Shots vs. IV Infusions:

B12 Shots: Fast and Efficient Absorption B12 shots deliver vitamin B12 directly into your bloodstream, ensuring rapid and powerful absorption

Yearly monitoring of B 12 status and suitable adjustment of the supplementation dose is recommended.50 For symptomatic deficiency (box 1) caused by insufficient dietary intake, intramuscular B 12 therapy is usually initiated with the aim of progressing to oral supplements once symptoms have resolved.789 Symptomatic deficiency in people with B 12 malabsorption Suggested treatment schemes differ considerably between countries

Mosby Elsevier, Philadelphia.

In the UK, the most commonly used injectable form of vitamin B12 is Hydroxocobalamin injection