3C Pharma Efirub Cold Snap 16 Sachets Tropical Flavour is a natural concentrate of plants, of highly dosed and selected vitamins and minerals which contains no synthesis molecule:- Echinacea and Andrographis are involved in body's resistance and support the natural defense mechanism in the respiratory tract.- Astragalus supports natural defences.- Thyme makes breathing easier and helps fight colds.- Vitamin C helps to reduce fatigue and exhaustion. With Zinc, they contribute to the proper functioning of the immune system.