Supports a Healthy Immune System. 250 mg of Quercetin Phytosome Per Serving. Non-GMO | Vegan. Gluten-Free. . Flavonoids such as Quercetin are an important class of natural products abundantly found in fruits, vegetables, grains, bark, roots, stems, flowers, tea and wine: all products whose beneficial effects on health are well known. Quercetin Blend, Quercefit is a unique Phytosome formulation of quercetin deriving from flower buds of the natural plant Sophora japonica L. Indeed, the most bioavailable quercetin on the market. Natures Answer Quercetin can be a great option to help provide a healthy immune support, upper respiratory health and seasonal allergy support. Natures Answer Quercetin Blend is up to 20 times more bioavailable than quercetin extract alone. Most Quercetin supplements in the market are typically characterized by poor absorption. Natures Answer Quercetin Blend uses a quercetin bound to sunflower sourced phospholipid which increases the bodys ability to absorb quercetin, along with zinc, copper and bromelain for immune and upper respiratory health-enhancing properties. Immune system health. Upper respiratory health. Natural inflammatory response to seasonal allergies. Sport performance & physical recovery. Contains Zinc & Copper to further enhance immune & respiratory health. Contains Bromelain for optimal absorption