They are provided by a health care professional, such as a doctor, nurse, or nurse anesthetist
Serum B12 levels may be checked only if: There is doubt about adherence or absorption (though with injections, absorption is bypassed)
But the moment you introduce a liquid, the clock starts ticking
B12 for Low Energy: Addressing Fatigue at Its Source Vitamin B12 Deficiency Symptoms and the Impact of Vitamin B12 Shots Its important to know the B12 deficiency symptoms to diagnose and treat this common health problem
Whether that combination makes sense for you is a clinical decision, not a one-size recommendation
Advantages of oral form over IM injection: Less nursing time on injections Less complexity of care Less discomfort/pain Less bleeding in patients who take anticoagulants Less costly according to some analyses Disadvantages of oral form over IM injection:: Greater risk of non-compliance In 1991, a survey done on Minneapolis internists led one commentary to conclude that oral vitamin B 12 replacement for pernicious anemia was one of medicines best kept secret. 18 In 1996, when the survey was repeated again in the same area, awareness and use of oral vitamin B 12 for pernicious anemia had increased substantially (019%), but the majority of doctors still remain unaware of this treatment option (61%)