Hista-Shield 120 capsules (Northern Nutrition)Formerly Aller -Shield

Aller-Shield is a natural antihistamine supplement that also helps boost the immune system. This product contains quercetin for its antihistamine properties, nettle extract for its high vitamin content, NAC for its mucus thinning abilities and for increasing glutathione (a very powerful antioxidant), and boswellia for its anti-inflammatory properties in the respiratory system.