1. Mullen W, Edwards CA, Crozier A: Absorption, excretion and metabolite profiling of methyl-, glucuronyl-, glucosyl- and sulpho-conjugates of quercetin in human plasma and urine after ingestion of onions. Br J Nutr. 2006 Jul;96(1):107-16. [PubMed:16869998]
  2. Mullen W, Boitier A, Stewart AJ, Crozier A: Flavonoid metabolites in human plasma and urine after the consumption of red onions: analysis by liquid chromatography with photodiode array and full scan tandem mass spectrometric detection. J Chromatogr A. 2004 Nov 26;1058(1-2):163-8. [PubMed:15595664]
  3. Jaganath IB, Mullen W, Edwards CA, Crozier A: The relative contribution of the small and large intestine to the absorption and metabolism of rutin in man. Free Radic Res. 2006 Oct;40(10):1035-46. [PubMed:17015248]
  4. Lee J, Ebeler SE, Zweigenbaum JA, Mitchell AE: UHPLC-(ESI)QTOF MS/MS profiling of quercetin metabolites in human plasma postconsumption of applesauce enriched with apple peel and onion. J Agric Food Chem. 2012 Aug 29;60(34):8510-20. doi: 10.1021/jf302637t. Epub 2012 Aug 20. [PubMed:22867437]