Do you know if Quercetin is contained in wine? Asking for a friend.
Red wine alcohol promotes quercetin absorption and directs its metabolism towards isorhamnetin and tamarixetin in rat intestine in vitro
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1760706/
The Role of Quercetin in Wine:”
Quercetin is a naturally occurring phenol in grape skins and stems that developed to protect grapes from ultraviolet light damage.
Generally speaking, the more grapes are exposed to sunlight, the more quercetin they contain.
Probably, the late harvest red grapes like cab contain the most Quercetin.