The typical approach is to add 25mL of bacteriostatic water, creating a workable concentration for measurement and administration in research subjects
Rarely, and almost exclusively from injections rather than oral supplements
Long-Term Effects (Weeks to Months): Hemoglobin production : Over time, Vitamin B12 injections can improve your blood count, which contributes to overall health and vitality
Signs your body is asking for it
NHS approach to B12 deficiency: NICE Clinical Knowledge Summaries recommend investigating B12 deficiency in patients presenting with macrocytic anaemia, unexplained neurological symptoms, or risk factors including pernicious anaemia, gastrectomy, malabsorption disorders, metformin use, proton pump inhibitors, or nitrous oxide exposure