syringe size for vitamin b12 injections Choosing the Right Needle and Injections: A Complete Guide what gauge needle for vitamin

Intramuscular injections of B12 are administered during the first stage of the test, an hour after the patient takes an oral dose of radiolabeled vitamin B12

Lall, S., Tung, L

Five foods rich in B12 include: Beef - 3 ounces contains 1.5mcg of B12 Eggs - 1 large egg contains 0.6mcg of B12 Fortified cereal - one cup contains 6mcg of B12 Salmon - 3 ounces contains 4.9mcg of B12 Low-fat milk - 1 cup contains 1.2mcg of B12 Vitamin B12 is primarily found in almost all foods of animal origin

Absolute deficiency occur up to 6% of those aged 60 years and older, whereas marginal deficiency occur in close to 20% of patients in later life ( Pernicious anemia is an autoimmune gastritis resulting from the destruction of gastric parietal cells and consequent impairment of intrinsic factors secretion to bind the ingested vitamin B12