how often do you get b12 injections for weight loss B12 Shots for Weight Loss:

Int Jnl Lab Hem 2009;31:1-8

the clinical relevance of this finding in humans is unknown, and in UK and EU prescribing information this is noted as a precaution rather than a formal contraindication but individuals with a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2 (MEN2) should discuss this with their doctor

B12 Vitamin Side Effects: What Should I Be Aware Of When Taking B12 Injections

They are also necessary for the interconversion of amino acids such as the metabolism of histidine to glutamic acid and the interconversion of serine and glycine

For conditions where there are defective nerves, such as peripheral neuropathy, neuralgia, and Mortons neuroma or any interspace perineural neuritis, injecting a concentrated B12 dose directly around the nerve has been shown to promote nerve repair and diminish pain from nerve damage