In addition, supplements like quercitin, bromelin, vitamin c, rutin, and others can help to strengthen the immune system and help to minimize excessive histamine release by mast cells. (mommypotamus.com)
A 2007 study looked at buckwheat and found: «Concentration of rutin [antioxidant compounds] was increased more than 10 times, with the production of quercitin and one newly formed flavonoid during 48 h germination.» (projectwellnessnow.com)
Onions contain «constituents» aka active ingredients such as tannins, terpenoids, alkaloids and flavinoids including quercitin that have immune boosting and anti-inflammatory effects. (drkvirdee.com)