It plays an important role on the proper functioning of the brain and nervous system. Its implications in the brain go from neurotransmitter production, to regulating the cells energy expenditure. The intake of foods rich in this vitamin is important, as they contain the nutrients needed for optimal equilibrium between body and mind. The main sources where we can find this vitamin are liver, meats, fish, eggs as well as milk and related products, though in lower quantities.

Vitamin B12 deficiency can cause symptoms like anemia, fatigue, like of energy and cognitive problems like memory loss.