Quercetin niacin co_crystals are a whole new ingredient. Everyone knows about quercetin and niacin but quercetin has very poor oral bioavailability and niacin causes severe flushing at decent doses. Bonding the molecules together increases the absorption of Quercetin many times over and prevents the Niacin flush. Quercetin has been mentioned for everything from endurance and an increase in VO2 Max to fat loss to its strong antioxidant effect, however, for our purpose we added it specifically for its ability to increase the absorption of our other ingredients. Specifically, epicatechin. Its as just an added bonus.