Vitamin B6 – Uses, Benefits, Sources and Dosage It is also called Pyridoxine. It is water soluble vitamin. It is involved in the process of formation of serotonin and norepinephrine, these act as neurotransmitters that transmit signals to brain. It is also involved in formation of myelin which is a protein layer around nerve cells. Sources of Vitamin B6 Vegetables such as carrots, spinach, peas and potatoes Milk, cheese, eggs, fish liver, meat and flour Cereal grains Legumes Banana Deficiency