where should inject themselves with a b12 Injections at Home - Safety Guide for Self-Administration Safe B12 Injection Guide at

Long-term use might make it harder for the stomach to absorb B12 from food

However, in megaloblastic anaemia caused by B12 or folate deficiency, the picture is more complex

It is an intracellular metabolic-enzyme modulator, which is why its research read-outs are things like NAD+ levels and adipocyte gene expression, not how full you feel. That mechanistic distinction is the single most important thing to understand before looking at any dose number

[DOI] [PMC free article] [PubMed] [Google Scholar] 330.Costford, S

Vitamin B12, or cobalamin, is vital for energy production, nerve function, and red blood cell formation