Vitamin B6 is one of the B vitamins that benefits the central nervous system. It is involved in producing the neurotransmitters serotonin and norepinephrine, and in forming myelin. Also known as pyridoxine, vitamin B6 is a water-soluble vitamin, which means it dissolves in water. It is not stored by the body, and it is excreted in the urine, so people need to take in Vitamin B6 every day. It is part of the family of B-complex vitamins.