Quest Vitamins Mega B Complex is a high potency timed released formula providing a full spectrum of the B vitamins plus vitamin C. Designed to support a hectic lifestyle, its helps support energy and concentration levels and reduce tiredness and fatigue and the effects of stress on the body. Vitamins B1, B2, niacin (B3), B6, pantothenic acid and vitamin C contribute to the reduction of tiredness and fatigue. Vitamins B1, niacin (B3), B6, B12, biotin and vitamin C contribute to normal functioning of the nervous system and normal psychological function. Vitamin C is an antioxidant nutrient that contributes to the protection of cells from oxidative stress and to the normal functioning of the immune system. As a water soluble nutrient vitamin C supplies in the body are used up quicker under stress leading to a lowering of immune function and increased incidence of infections. Directions: Take one tablet daily with a meal