Dietary supplements; nutritional supplements; medical foods, namely, medical food supplements and dietetic food supplements, both containing quercetin; nutraceuticals for use as dietary supplements and nutritional supplements; vitamin preparations and mineral preparations for restoring health in individuals with diseases, disorders, and adverse health conditions; dietary supplements for restoring health in individuals with diseases, disorders, and adverse health conditions; therapeutic agents for human medical, medicinal, and therapeutic purposes, in the nature of food supplements, namely, antioxidants for increasing quercetin in the body for supporting respiratory function, promoting stabilization of mast cell membranes, modulating histamine release, and optimizing cytokine profiles; functional nutrient preparations containing quercetin to mitigate histamine release, inflammatory response, and oxidation of LDL cholesterol; specialty nutraceuticals for the dietary management of diseases, disorders, and adverse health conditions that can be remediated with quercetin, namely, exaggerated immune response, exaggerated inflammatory response, and hyperimmune reactions