Our bodies require a daily intake of essential vitamins and minerals in order to properly function. If one of these vitamins is deficient, it can result in serious health problems. Most of our B12 comes from meat in our diet. Those who are unable to absorb an adequate amount of B12 due to dietary restrictions or health problems may need to get a natural supplement through a B12 shot. The shot is a quick way to get your B12 levels back to where they should be. An injection of B12 can bring on immediate health benefits.