Suro Organic Elderberry Capsules are made with Canadian grown elderberries. These capsules are vegan, kosher and organic certified. Elderberries have natural antiviral properties and have been used for centuries against cold and flu. Modern research has proven this benefit and it has been shown to be efficient against many strains of flu virus. A study has demonstrated that Canadian elderberries have better resistance to light and heat than European elderberries making them a superior choice in natural plant remedies.