injections of b12 are given in the treatment of Compounded Hydroxocobalamin (Vitamin B12) Injection Vitamin B12 A Vitamin B12

However, individuals can take steps to maximize the effectiveness of B12 injections, including maintaining a balanced diet, staying hydrated, addressing underlying health conditions, following healthcare provider recommendations, and adopting a healthy lifestyle

Ok, so these are interesting points but please add this into the mix for future answers: The NICE Guideline clearly states that there is insufficient research why some people need more frequent injections than others and that an 8- or 12- weekly schedule does not work for everyone and some may need more frequently

Dementia and depression have been associated with this deficiency as well, possibly from the under-production of methionine because of the inability to convert homocysteine into this product

doi:10.1016/j.ejmg.2019.103713

Most people can prevent it by eating enough meat, poultry, seafood, dairy products, and eggs