Quercetin is widely distributed in the plant kingdom and is the most abundant of the flavonoid molecules. It is found in many foods, including apples, onions, teas, berries, vegetables of the cabbage family, seeds, and nuts. The crucial advantage of Quercetin Phytosome is its advanced phytosome technology. Phytosome complexes are created by a patented process that binds a botanical extract to phosphatidylcholine, a key component of cell membranes. In the case of Quercetin Phytosome, quercetin is combined with sunflower-sourced phosphatidylcholine to create a phytosome complex that easily crosses the gut barrier. Quercetin has demonstrated many beneficial effects for human health. Its most well-known mechanism of action involves stabilization of mast cell membranes, which may help to decrease the release of histamine. Other benefits include cardiovascular support and protection of the gastrointestinal tract. A number of quercetin’s beneficial effects appear to be due to its antioxidant activity. Quercetin scavenges free radicals and inhibits the oxidation of LDL cholesterol. By itself, and when paired with vitamin C, quercetin reduces the incidence of oxidative damage to skin and nerves caused by glutathione depletion. Ingredients: One Capsule Contains: Quercetin Phytosome (Sophora japonica concentrate (leaf) / Phosphatidylcholine complex from Sunflower) 250 milligrams. Other Ingredients: Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Leucine, Silicon Dioxide. Suggested use: Take 1 capsule two to three times daily with meals or as recommended by your health-care practitioner.