Tropical Breathe Respiratory (Lung) and Immune Support A Qi (energy) tonic. Helps improve immune and lung function. Orderless Garlic Boosts the immune system and helps fight colds and flu. Vitamin C One of the most important anti-oxidant vita-mins, boosts immune function to help pro-tect the body against infection. Zinc Crucial for your immune system and meta-bolic function. Can reduce the duration and severity of a cold, flu and/or sore throat.