A study published in December 2002 by the Journal of Allergy and Clinical Immunology (JACI) provides evidence that the upper airway is the first site of response, demonstration the role of the nose after allergen exposure. Additionally, The Asthma and Allergy Foundation of America (AAFA) states that the first option for allergy suffers is environmental control, which means avoiding the allergens that cause your allergies. NasalGuard offers a unique way to protect you when complete avoidance is unrealistic. All airborne particles have some type of electrostatic charge associated with them. Most airborne allergens, like dust, dander, pollen and mold spores are negatively charged. By using simple physics and safe ingredients, NasalGuard, a specially formulated "positively charged gel" is able to impart a "filter-like" screen that safely snags irritating allergens before they make their way into the nasal passages. NasalGuard's patented methodology and formula is invisible, fragrance-free and requires no drugs.