Vitamin B12 deficiency is rarely sudden. It's a slow declineoften driven by poor absorption, not just intake. Essential for energy metabolism and nerve function, low B12 can lead to fatigue, metabolic inefficiency, Your body doesn't make vitamin B12, you have to get it from animal based foods or from supplements. When you've had surgery for PMP and appendix cancers, you may be unable to absorb Schedule busy and no time to sit through an IV? No worries, come get an injection instead! Vitamin B 12 intramuscular injections are also used therapeutically to help restore energy and combat various symptoms related to such deficiencies. Vitamin B 12 is essential to the development of healthy blood cells, nerve B12 Shots vs. IV Infusions: What is the difference? Integrative Medicine, Laser and Aesthetics