Swisse Ultiboost Immune is a premium quality formula containing vitamins, minerals and herbs to help maintain healthy immune function and provide symptomatic relief from cold symptoms. Immune Function: Zinc and vitamin C support a healthy immune system, helping to maintain a healthy immune response. Cold Symptoms: Symptoms of the common cold include blocked or runny nose, dry cough and mucous congestion. Zinc and vitamin C help to reduce the duration and severity of cold symptoms. Support During Stress: Vitamin C is important for the adrenals. Healthy adrenal function helps support the body's response to stress. Antioxidant Support: Vitamin C provides antioxidant support to help protect against potential free radical damage. Swisse Ultiboost Immune has been formulated based on scientific evidence to provide key ingredients beneficial for immune health in a convenient dose.