Vitamin B6, also known as pyridoxine, is a water-soluble vitamin, which means it dissolves in water. The human body does not produce vitamin B6 so it is vital to make sure the body has enough vitamin B6 every day from food or supplements. Pyridoxine is a coenzyme that assists over 100 enzymes to perform various tasks, including the breakdown of proteins, carbohydrates, and fats. They also work to support the function of the immune system and brain health. Vitamin B6 can be taken as a supplement tablet. The vitamin has been widely studied for its role in the prevention of disease.