Also known as pyridoxine, this vitamin is widely available through many animal and vegetable sources. It is rarely lacking in a western diet, and excess supplementation may be more problematic. This can result in an alteration to the nervous system – presenting as tingling in the arms and legs possibly.
Vitamin B6 is a cofactor in many metabolic pathways including heme synthesis. Vitamin B6 deficiency may be observed in patients with metabolic disorders, secondary to therapeutic drug use, or alcoholism. Deficiency affects the function of the immune system.