will b12 injections give me energy Here's why you need to try a Vitamin injection... and Balance. - 3D Lipo Vitamin B12 Injections for Aging

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

These may consist of

It starts with digestion

[2] The MHRA Drug Safety Update (August 2022) advises healthcare professionals to consider testing vitamin B12 levels in patients taking metformin who develop symptoms of neuropathy or anaemia, and to consider periodic monitoring in those at risk of deficiency

The most commonly reported adverse effects were mild to moderate headache and gastrointestinal symptoms including diarrhea, flatulence, nausea, and increased appetite