There is nothing more uncomfortable than allergies that cause: sinus congestion runny nose sneezing itchy, watery eyes Children''s Sinus Support ingredients are supported by thousands of years of tradition and backed by science to support healthy sinus, bronchial, & immune function. Vitamin C promotes a normal histamine response and healthy immune function Quercetin has been shown to promote normal histamine levels in the body. Bromelain thins mucus secretions and helps clear the airways. Marshmallow promotes healthy mucus membranes and soothes against occasional irritation. Stinging Nettle supports a healthy inflammatory response and promotes sinus health during all seasons. Barberry inhibits harmful bacteria from taking up residence. Eyebright soothes occasional irritation of the eyes. Ivy Leaf promotes healthy mucus membranes and defends the bronchial lung passage-ways against occasional irritation. Xylitol is a natural sweetener shown in research to promote healthy teeth.