| estimated daily intake and seasonal food sources of quercetin in japan. | quercetin is a promising food component, which can prevent lifestyle related diseases. to understand the dietary intake of quercetin in the subjects of a population-based cohort study and in the japanese population, we first determined the quercetin content in foods available in the market during june and july in or near a town in hokkaido, japan. red leaf lettuce, asparagus, and onions contained high amounts of quercetin derivatives. we then estimated the daily quercetin intake by 570 residents ... | 2015 | 25849945 |