Quercitin
Quercetin is a bioflavonoid similar to Rutin found in relatively high levels in onions,Green tea.
red wine and apples, Quercetin demonstrated is capability to inhibit the release of Histamines and blood vessels dilatation during allergic process,It is strong antioxidant,with anti-inflamatory anti-viral, immune modulatory,anti-cancer, and gastro-protective activity.It may fight allergies owing to an antihistamine-type action.