B12 Injections: How They Work and Who Needs Them Meo Nutrition How Often Should I Get B12 Shots? A Guide to Your Schedule Vitamin B12 A Vitamin B12 injection is a quick shot that gives your body vitamin B12 directly into the muscle. This helps your body absorb it faster than tablets. Vitamin B12 helps Feeling tired, foggy, or run down? It could be a B12 deficiency Weekly B12 injections help support: Increased energy + reduced fatigue Sharper focus + better mood Boosted