for what health issue are b12 injections used Shots: Vitamin B12 Benefits, Uses, Risks Which injection contains vitamin B12?
Description
Explored in adipose tissue and energy balance research
Adenosine Triphosphate Tetrasodium Dihydrate 1 mg

PMID 32133101

You should take B12 shots if you suffer from B12 deficiency, especially if you are not able to absorb B12 through the stomach (pernicious anemia)

*Individual experiences vary

However, not everyone with an MTHFR mutation will exhibit clinical symptoms or have significant methylation issues