b12 injections in thigh video Vastus Lateralis Intramuscular Injection - Everything You Need To Know Vitamin B12 Injection - YouTube
Description
Extra B12 is usually removed from the body within 48 hours, depending on urine volume

In two previous clinical trials, the combination use of vitamin B12 (500 g/day) and folic acid (5 mg/day) for about eight weeks led to a significant improvement in FBG levels and HOMA-IR 41,42

This injection is especially helpful when the body cannot absorb vitamins efficiently through oral supplements
However, if you have a low B12 level or a vitamin B12 deficiency, it can cause physical, neurological, and psychological problems

May I ask how you know your deficiency was alcohol related and not autoimmune
