should b12 be injected subcutaneously or intramuscularly Injecting How to Inject Vitamin B12

This means that the body will be able to burn the fat instead of simply burning the sugars we consume

How soon can someone expect to feel energized after receiving a B12 shot

Patients taking certain medications (e.g., chloramphenicol may reduce the effectiveness of B12 therapy) or with risk factors for B12 deficiency (metformin use, proton pump inhibitors, nitrous oxide exposure, vegan diet) should discuss these with their healthcare provider

Most practitioners recommend starting at 250-300 mcg daily to assess tolerance, then potentially increasing to 400-500 mcg if initial response is suboptimal and no side effects occur