Solgar Vitamin B12 100mcg is a dietary supplement with Vitamin B12, which is the only vitamin that contains cobalt, a mineral necessary for the formation of red blood cells. It also performs different functions in the body, such as reducing fatigue and helping with energy metabolism. In addition to increasing energy, vitamin B12 provides several health benefits, such as promoting general well-being and vitality, stimulating the immune system, mental balance and forming red blood cells.