at what level should you get b12 injections how often i inject vitamin When Should a Vitamin B12 Injection? Vitamin B12 Shot - Delaware:
Description
2225 gauge, 11.5 inch for adult muscle)

From a pharmacokinetic perspective, studies indicate no evidence that the combination of Vitamins B1, B6, and B12 adversely affects the pharmacokinetics of each individual vitamin

As discussed, GLP-1 therapy creates a real risk of B12 depletion over time

A study by Li et al