Myricetin (Myr)

Myricetin is a naturally occurring flavonol, a flavonoid found in many grapes, berries, fruits, vegetables, herbs, as well as other plants. Walnuts are a rich dietary source. Trace amounts can be found as glycosides. It is one of the phenolic compounds present in red wine. Myricetin has antioxidant properties.[citation needed] A Finnish study correlated high myricetin consumption with lowered rates of prostate cancer. Another 8-year study found that intake of three flavonols (kaempferol, quercetin, and myricetin) were associated with a reduced incidence of pancreatic cancer in people who smoke. Myricetin also reduces nocturnal levels of melatonin through the inhibition of serotonin N-acetyltransferase, potentially affecting circadian rhythm. In vitro research suggests that myricetin in high concentrations can modify LDL cholesterol such that uptake by white blood cells is increased.