DAILY DIETARY SUPPLEMENT: Uniquely formulated using a blend of quercetin and bromelain, this supplement from ForestLeaf may help with sinus relief and prevent a number of health concerns including allergies, cardiovascular and respiratory health. WITH STINGING NETTLE: Every pill contains stinging nettle leaf extract, Which contains a wide variety of nutrients that assists in balancing your natural inflammatory response for happier living. GIVE YOUR IMMUNE SYSTEM A BOOST: Quercetin is a natural flavonoid and medicine that helps balance immune system functions and has antibacterial properties that are effective against all types of microbes. It may also help fight off viruses and infections.