There can be any number of reasons you might be feeling zapped of energy. A lack of energy is commonly combined with lackluster skin and hair, mental fogginess, and a slower metabolism. If you're looking for a way to boost your energy levels and improve your overall health, B12 injections might be just what you need. These injections are a quick and easy way to get a high dose of vitamin B12, which is essential for maintaining a healthy nervous and immune system, supporting brain function, and maintaining a radiant glow.