Contact your GP for B12 testing if you have: Symptoms suggesting deficiency (persistent fatigue, pins and needles, memory problems, glossitis) Risk factors for deficiency (vegan diet, gastric surgery, long-term metformin or proton pump inhibitor use) [1] [4] Concerns about whether your current supplementation dose is appropriate Underlying conditions affecting B12 metabolism (kidney disease, liver disease) Unexplained high B12 levels on a blood test when not taking supplements Routine monitoring is essential for patients receiving therapeutic B12 injections
Vukojevi, J., Milavi, M., Perovi, D., Ili, S., ili, A
This article compares mechanism, Phase 2 trial design, reported efficacy, tolerability signals, and research-use status
Second step is to ensure the observation by carrying out the laboratory tests