b12 injection norwich Injections at Olympia Veterinarians may prescribe vitamin B12 injections to animals with a deficiency Vitamins & Hay Fever Relief

Inadequate secretion of intrinsic factor, resulting from lesions that destroy the gastric mucosa (ingestion of corrosives, extensive neoplasia), and a number of conditions associated with a variable degree of gastric atrophy (such as multiple sclerosis, certain endocrine disorders, iron deficiency, and subtotal gastrectomy)

So, yes, you can definitely overdo it with B12 injections

Bupropion, a nonselective dopamine- and norepinephrine-reuptake inhibitor, is considered to reduce weight by stimulating hypothalamic POMC neurons

Other indicators include a family history of pernicious anaemia or other autoimmune conditions (such as type 1 diabetes mellitus, Hashimotos thyroiditis, or Graves disease), or if the patient is taking metformin, proton pump inhibitors (PPIs), H2 antagonists or has a history of nitrous oxide misuse[15]