where does b12 injection go How to self-inject intramuscular vitamin - Overview B12 Shots at Home: How,

However, the oral route cannot be excluded as it did not depend on intrinsic factors only, as the simple diffusion (without the need for intrinsic factors) is now considered another mechanism for the absorption of vitamin B12 [49, 50]

Here's the TL;DR on vitamin timing: while there is no official medical advice dictating that you should take vitamin supplements at a specific time of day to improve their efficiency, there is quite a lot of research showing that avoiding some vitamin supplements at particular times (or more accurately, with particular meals) can improve absorption, or that taking some vitamins alongside food can reduce the risk of adverse side effects

The use of B12 also provides neuroprotective and nerve-regeneration benefits, allowing it to alleviate neuropathic pain and muscular dysfunction by promoting health and muscle recovery

Standard Medical Protocols Doctors usually start with a strong phase of treatment