Allergies are provoked from plants, perfumes, food and the environment. Finding your triggers is the first step. Boosting immunity, reducing histamine production and defending against the offenders (like gluten) are other nutritional steps that can help. Quercetin, found in apples and onions, is a bioflavonoid that is nature's anti-histamine and our #1 seller during the allergy season. Make sure to start allergy defense 2-3 weeks before you need it!