It should be emphasised, however, that this does not constitute a scientifically validated protocol or a recommendation for use
Common indications include: Pernicious anaemia an autoimmune condition where the stomach cannot produce intrinsic factor, a protein necessary for B12 absorption [8] [9] Malabsorption disorders including Crohn's disease, coeliac disease, or following gastric surgery Strict vegan or vegetarian diets with confirmed deficiency though high-dose oral B12 may be sufficient if no malabsorption exists Certain medications such as metformin or proton pump inhibitors that may interfere with B12 absorption [9] [10] Neurological symptoms including peripheral neuropathy, memory problems, or balance difficulties related to deficiency Diagnosis should be confirmed through blood tests measuring serum B12 levels, full blood count, folate, and often anti-intrinsic factor antibodies
That flexibility makes B12 one of the most common SubQ options for patients who want to maintain their energy or nutrient routines at home under professional direction
Vitamin B12 is completely water-soluble, meaning your body safely flushes out any excess, making toxicity non-existent