lump at injection site after b12 shot Is A Dog Vaccine Normal? Golf sized lump on my

21 In some countries, nasal or sublingual B 12 preparations are available

doi: 10.1152/ajpendo.00402.2009

Vitamin B12 injections are most clinically appropriate in cases of confirmed vitamin B12 deficiency, malabsorption syndromes including pernicious anaemia or post-gastric surgery, significant symptoms where rapid restoration of vitamin B12 levels is required, or failure of oral supplementation due to poor absorption

Common injection sites include the abdominal area (at least 2 inches from the navel), thighs, or back of the upper arms

Vitamin B12 deficiency anemia is usually treated with injections of vitamin B12