How to Give a B12 Injection: Step By Step Instructions Boost energy and support metabolism with B12 injections! Feeling drained, sluggish, or stuck in a weight loss plateau? Once weekly B12 injections deliver nutrients into the muscle for quicker absorption to help support 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 Injection sites + How to use B12 Shots Safely Super B12 Complex Inj. Venture Medical Weight Loss