B vitamins play important roles in nearly all of the body's functional systems. Some of the wide-reaching supportive roles of B vitamins include the health of the nervous system, support for liver, skin and hair as well as maintaining muscle tone in the gastrointestinal tract. A sufficient level of B vitamin intake is essential for maintaining adequate energy metabolism, mood balance, hormone synthesis, hemoglobin formation and proper nerve cell impulse transmissions. Because B vitamins work together as a team, a good recommendation is to regularly take a supplement that contains the whole vitamin B complex family. Even when you are taking only one individual vitamin B vitamin product for specific support (such as vitamin B12 or folate), it is still recommended to take a complete B vitamin supplement along with it to give you full B vitamin support. The whole B family is needed to help keep your body in balance and harmony for physical, emotional and mental health. Even if you were able to eat large amounts of foods that are rich in B vitamins, such as fruits, vegetables and grains, you might still typically fall short of the desired daily intake of B vitamins.