Excuse me, but I'm a bit confused by the question "Is quercetin a DAO supplement?" Could you please clarify what you mean by "DAO supplement"? DAO typically stands for Decentralized Autonomous Organization, which is a type of blockchain-based organization that operates without a central leadership or management structure. Quercetin, on the other hand, is a flavonoid, a type of plant pigment with antioxidant and anti-inflammatory properties. So, it's not immediately clear how quercetin could be related to a DAO. Are you perhaps asking if quercetin is a supplement that supports some aspect of DAO technology or operations? Or is there a different context in which "DAO supplement" is being used? I'd appreciate it if you could provide some more information to help me better understand your question.