vitamin b12 injection or oral shots: Uses, benefits, and side effects Vitamin B-12 Injections Vs Oral

[1] However, whilst acute toxicity is rare, elevated serum B12 levels can occasionally occur and may warrant investigation, particularly when they arise unexpectedly or in the context of certain medical conditions

Frequency depends on your levels and goals

NHS guidance describes an initial phase that can be every other day for 2 weeks (or until symptoms improve).Maintenance schedules are often every 23 months in appropriate long-term cases

The frequency of administration may decrease over time as well once the vitamin has been able to build up a bit in the body

If these persist or worsen, contact your healthcare provider immediately

B12 injections are a common treatment prescribed by healthcare professionals for people with a vitamin B12 deficiency