Sambucol is a black elderberry extract dietary supplement with vitamin C to support immune system. It's unique formulation, is packed with rich black elderberries which gives it a nice taste. It has been clinically studied to reduce cold & flu like symptoms such as runny nose, blocked nose, cough, sore throat, sneezing and tiredness. Clinical studies have shown that Sambucol reduced the length of symptoms by 3 days which means that patients have recovered 3 days faster.