Nutritional Therapeutics Breathe Clear with NT Factor contains both Quercetin and Bioflavoids, key ingredients in the reduction of allergy inflammation and reaction. It was specifically designed to work on the inflammation and symptoms of environmental allergies and asthma. Environmental allergy sufferers most often see fatigue, congestion and difficulty breathing, as primary symptoms. Breathe Clear with Nt Factor reduces all those effects, using to reduce fatigue, and support the other ingredients. Add on to that the anti-inflammation and anti-histamine effect and you have a powerful allergy fighter.