Natural Factors Complete B 100 mg - Time Release - B Complex vitamins are co-enzymes involved in energy production, and maintaining optimal intake levels and promoting proper absorption and utilization is critical for excellent overall health. B vitamins assist in the maintenance of healthy nerves, skin, eyes, hair, liver and mouth, as well as balancing brain functions, helping us deal with both physical and mental stress. B Vitamins are most effective when taken together as a complex, as each assists the other in proper absorption and bio-availability. Natural Factors Complete B is a full 100 mg of the B's in a convenient time-release format for busy people on the go, who want to insure proper Vitamin B support - all day long.