A meta-analysis of four observational studies, following a total of 7,475 older individuals for 3 to 16 years, found a weak association between an elevation in vitamin B 12 of 50 pmol/L in blood and a reduction in fracture risk (114)
For information about supplements that may help with other forms of nerve pain, see our answer to the question: Do any supplements, like Nervive, help with nerve pain, like sciatica or diabetic neuropathy
Nausea affected 28% of participants at the 12 mg dose, which is lower than Semaglutides 44% rate
If your plan provider considers the treatment a medical necessity based on your doctor's recommendation, you could receive your B12 shots at a much lower cost or even for free
On their own, B12 injections are unlikely to cause meaningful weight loss