how long should i be on vitamin b12 injections to self-inject intramuscular - Overview How Long Do B12 Injections

What are the contraindications to B12 (cobalamin) injections in patients with various medical conditions, including allergies, Leber's optic neuropathy, pregnancy, breastfeeding, kidney disease, liver disease, and those taking medications like chloramphenicol (antibiotic)?

Doctors can check your Vitamin B12 levels with a simple blood test

However, Vitamin B12 only occurs in animal products, not in vegetables, and therefore strict vegetarian or vegan diets that exclude dairy products may result in an inadequate amount, although a deficiency may not be apparent for many years

doi:10.1007/s13311-019-00767-8 Lejri I, Grimm A, Eckert A

Both unborn and newborn babies have a special need for vitamin B12 and if the mother is a vegetarian or a vegan, this need may not be met either through her diet for the unborn or through her breast milk for the newborn