Supports Healthy Sinus Cavities Supports Healthy Respiratory Function Supports Healthy Immune Function Gluten Free Dietary Supplement Putting Health In Order Quality & Purity Guaranteed Laboratory Tested Adult Sinus Support Vitamin C supports healthy immune function. Quercetin and Bromelain support healthy sinuses and respiratory function. N-Acetylcysteine and Ivy Leaf support healthy respiratory function. Bioflavonoids work with Vitamin C to support healthy immune system function. Stinging Nettle supports sinus health during all seasons. Barberry promotes a healthy digestive system and supports balanced immune function. 4-Point Quality Control Every natural health solution from Redd Remedies is produced with 4-Point Quality Control. We Verify Every raw material vendor Every raw material used Every step of the manufacturing and packaging processes Every product specification for every batch including testing by industry-leading, independent laboratories