Immune Defence contains a formula of natural plant extracts, fortified with antioxidants, to support the body’s natural immune defence to fight illness. Black Elderberry his traditionally used in Western herbal medicine to relieve the severity of common cold symptoms. Andrographis helps relieve the severity and duration of symptoms from common colds and mild upper respiratory tract infections. Vitamin C and Zinc are vital nutrients for immune system function. Adults take 2 tablets daily or as directed by your healthcare professional.