how long does b12 injections last Are Vitamin Shots Right for You? How Long Does a B12

The gauge of the needle refers to its thickness

B12 injection doses can range from 100 mcg to 1,000 mcg, depending on the person, their age, and their condition

B12 injections are more effective in getting into your body because theyre given intravenously, straight into your bloodstream

Human safety, efficacy, dosing, and clinical utility havent been established

The third is duration and safety : short controlled studies in animals say almost nothing about what months or years of exposure would do in a human, which is precisely why the cycling section defaults to scheduled off periods rather than open-ended use