Showing pharmacokinetics for Quercetin metabolite after consumption of various sources Metabolism
  Wiczkowski W., Romaszko J., Bucinski A., Szawara-Nowak D., Honke J., Zielinski H., Piskula M.K. (2008) Quercetin from shallots (Allium cepa L. var. aggregatum) is more bioavailable than its glucosides. J Nutr 138:885-8 PubMed (18424596)  
Plasma analysed after enzymatic deconjugation
| Plasma Concentration (µmol/L) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number | Dose | Multiple Dose Duration | Time (hours) | Polyphenol Source Name as described in publication | |||||
| 0 | 1 | 2 | 3 | 12 | 24 | ||||
| 1 | 1.4 mg/kg bw | Single Dose | 0 | 0.8 | 0.9 | 0.8 | 0.5 | 0.2 | 
                shallot flesh
             | 
| 2 | 1.4 mg/kg bw | Single Dose | 0 | 1.1 | 1.8 | 3.9 | 0.9 | 0.2 | 
                dry shallot skin
             |