From the Manufacturer : Description: B vitamins are interdependent upon each other and interrelated in function they convert food into energy and help maintain the nervous system and body tissues. Prolonged release vitamins slowly release nutrients into the body over an extended period of time.* For Your Health: Unconditionally guaranteed for purity freshness and label potency. No Sugar Salt Yeast Preservatives Artificial Flavors or Colors. Directions: Take one (1) tablet daily with any meal for maximum daily results or as directed by a medical practitioner.