Source Naturals Activated Quercetin Bioflavanoid Complex - 100 Capsules Features: Quercetin is a unique bioflavonoid that has demonstrated the ability to inhibit the release of histamine from immune cells, according to human cell culture studies. By inhibiting the release of histamines and leukotrienes into our bloodstreams, quercetin can leave us free to enjoy the natural world. Source Naturals combines its quercetin with bromelain, an enzyme derived from pineapple that is known to increase the bodys ability to absorb various substances. Bromelain also is known to have many of the same histamineand leukotriene-inhibiting properties as quercetin, so they enhance each others performance. Magnesium ascorbate is a buffered (non-acidic) form of vitamin C that helps support the immune system. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, salt, preservatives, or artificial color, flavor or fragrance. Product Details: Product Dimensions: 2.2 x 2.2 x 3.9 inches ; 0.32 ounces Shipping Weight: 4 ounces Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues. International Shipping: This item is not eligible for international shipping. Learn More UPC: 021078007463 Item model number: SN0746