With NAC, echinacea, reishi, cat's claw, vitamins C, A, B12 and trace elements zinc, iron, copper and selenium. Vitamins A, C, B12 and the trace elements zinc, copper, iron and selenium contribute to the normal function of the immune system. Vitamins C, B12 and iron help reduce tiredness and fatigue. Vitamin C, zinc, copper and selenium contribute to the protection of cells against oxidative damage. Activates the immune system, and acts as a shock treatment 2 tablets a day, in the morning and at night, after meals.