Elderberry is extremely high in vitamin C, flavonoids virus-fighting proteins that work together to give your immune system an extra shield against the cold flu. Taking 1 tsp. to 1 tbsp. of the extract 2X a day can do wonders for your immunity. Its antioxidant activity lowers cholesterol, improve vision, boosts immunity, improves heart health heals bacterial viral infections tonsillitis. Its anthocyanins protect the inner layer of blood vessels from oxidative stress.