Spring Defense Tonic (previously Allergy Defense Tonic) is a natural herbal formula designed to keep you bright eyed and breathing easy so that you can enjoy your Spring days with ease. This blend works hard to keep your nasal passageways feeling open and clear by supporting a normal, healthy response to pollen and environmental irritants. Spring Defense Tonic supports us at the root by maintaining normal histamine metabolism as the grass gets greener and flowers start to bloom — so you can continue feeling your best during pollen season and beyond.*