Vitamin B6, also known as pyridoxine, is a water-soluble vitamin that plays a crucial role in various bodily functions. It helps the body convert food into energy and is essential for the production of neurotransmitters, which are chemicals that transmit signals in the brain. This vitamin also supports immune function and helps in the formation of red blood cells. Foods rich in vitamin B6 include poultry, fish, potatoes, chickpeas, bananas, and fortified cereals. The recommended daily intake varies by age and gender, but most adults need about 1.3 to 2.0 milligrams per day. A deficiency can lead to symptoms like anemia, depression, and weakened immune response.