A strong immune system helps to fight infections. Sambucol Immuno Forte Capsules contain a blend of Vitamin C and Zinc, required by the body for normal functioning of the immune system.These capsules are designed to support your immune system and prevent sniffles from becoming the full on flu. Made from a blend of vitamin C and zinc, they also contain black elderberries along with naturally occurring flavonoids,which are prepped in Sambucol to maximise their health benefits.