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 Injections vs. Oral Supplements: Which Works Better? Should You Use Sublingual B12 Over Capsules & Shots? The B12 Shot: What Every Human Needs to Know About Injectable Vitamin B12 Are you feeling run down? Low Energy? A quick Vitamin B12 injection can help support energy, metabolism, and overall wellness. It delivers the vitamin directly into the muscle, allowing your body to