With NAC, echinacea, reishi, cat's claw, vitamins C, A, B12, and the 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 from oxidative damage. Activates the immune system and acts as a shock treatment. Take 2 tablets daily, morning and evening, after meals.